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Fawcett, H. S.   1936.   Citrus diseases and their control.   Second edition.   McGraw-Hill Book Co., New York and London.   656 pp.

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——   1926.   Polyembryony, heterozygosis, and chimeras in Citrus.   Hilgardia 1:365-402.

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Gildemeister, E. and F. Hoffmann.   1913-22.   The volatile oils.   Second edition.   Authorized translation by Edward Kremers.   John Wiley & Sons, New York.   3 vol.   (See specifically: The oils of the agrumens.   3:1-110.)

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Haines, H. H.   1921.   The botany of Bihard and Orissa, Part II.   Adlard & Son, London, 224 pp.   (See specifically: Rutaceae, pp. 158-68.)

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Lunan, J.   1814.   Hortus Jamaicensis.   St. Iago de la Vega Gazette, Jamaica.   2 vol.

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Maiden, J. H.   1921.   Eremocitrus glauca Swingle, the wild lemon.   In his: Forest flora of New South Wales 7:239-45.

Marcovitch, B. B.   1926.   Indeeling van het geslacht Citrus.   [Classification of the genus Citrus.]   In: Landbouw [Buitzenzorg, Java] 2(4):25 pp.

Matlack, M. B.   1931.   The juice sac of the orange, with some observations on the plastids of citrus.   Jour. Wash. Acad. Sci. 21:438-40.

McKee, R.   1927.   Chinese dwarf Meyer lemon introduced.   U.S. Dept. Agr. Yearbook 1926:218-21.

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——   1923-26.   An enumeration of Philippine flowering plants.   Bur. of Printing, Manila.   4 vol.   (See specifically: Rutaceae.   2:326-45.)

——   1926.   The flora of Banguey Island.   Philipp. Jour. Sci. 29:341-429.

——   1931.   Unrecorded Plants front Kwangtung Province.   Lingnan Sci. Jour. 7:297-326.

——   1935.   A commentary on Loureiro's Flora Cochinchinensis.   Trans. Amer. Phil. Sci. (n.s.) 24(2):l-445.

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Nagai, Keizo, and I. Takahashi.   1925.   Root grafting of the citrus tree.   Imp. Hort. Exper. Sta. [Okitsu, Japan] Res. Bul. 3:11 pp.   [Japanese with English summary.]

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Nakamura, M.   1934.   Cytological studies in the genus Citrus. II. The chromosome number, pollen sterility and the formation of abnormal pollen tetrads.   Stud. Citrol. 6:162-78.   [Japanese with English summary.]

Nelson, E. K.   1934.   The occurrence of a pentamethyl flavonol in tangerine peel.   Amer. Chem. Soc. Jour. 56:1392-93.

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Ridgway R.   1912.   Color standards and color nomenclature.   The Author, Washington, D.C.   43 pp.

Ridley, H. N.   1922.   Flora of the Malay Peninsula.   L. Reeve & Co., London.   5 vol.   (See specifically: Rutaceae.   1:340-59.)

——   1930.   Addition to the flora of Borneo.   Kew Bul. Misc. Inform. 1930:74-87.

Risso, J. A.   1813.   Essai sur l'histore naturelle des orangers, bigaradiers, limettiers, cédratiers, limoniers ou citronniers cultivés dans le Départment des Alpes Maritimes.   Dufour, Paris.   74 pp.

Risso, J. A., and A. Poiteau.   1818-22.   Histoire naturelle des orangers.   Audot, Paris.   280 pp.

——   1871-72.   Histoire naturelle des orangers.   Nouvelle edition, entièrement revue et augmentée d'un chapitre nouveau sur la culture dans le midi de l'Europe et en Algérie, par M. A. du Breuil.   Henri Plou, Paris.   232 pp.

Robinson, T. R., and E. M. Savage.   1934.   Acid citrus fruits for the Gulf Coast and Eastern subtropical crops region.   U.S. Dept. Agr. Bur. Plant Indus.   12 pp.   (Mimeo.)

Rosenberg, H. R.   1942.   Chemistry and physiology of the vitamins.   Interscience Pub. Co., New York.   676 pp.   (See specifically: Vitamin P.   pp. 513-18.)

Roxburgh, W.   1795-1819.   Plants of the coast of Coromandel; selected from drawings and descriptions presented to the Hon. Court of Directors of the East India Co.   Pub. by their order.   W. Bulmer, London.   3 vol.   (See specifically: Aegle Marmelos.   2:23. pl. 143.)

——   1832.   Flora indica; or descriptions of Indian plants.   Serampore.   Printed for W. Thacker & Co., Calcutta, and for Parbury, Allen & Co., London.   3 vol.

Ruggieri, G.   1935.   La diversa resistanza alla defogliazione prodotta dal vento in alcune specie di "Citrus" in rapporto alla struttura anatomica del picciolo.   R. Staz. Patol. Veg. di Roma Bol. (n.s.) 15:169-99.

Rumphius [Georg Eberhard Rumph].   1741-55.   Herbarium Amboinense.   M. Uytwerf, Amsterdam.   7 vol.

Rusznyak, S., and A. Szent-Gyorgyi.   1936.   Vitamin P: flavonols as vitamins.   Nature. 138:27.

Santiago, A.   1962.   An illustrated guide to Malayan Citrus species and varieties.   Div. Agr., Min. Agr. Coop., Federation of Malaya.   138 pp.

Scora, R. W.   1966.   Contribution to the study of essential leaf oils in Severinia buxifolia (Poir.) Tenore.   Phytochemistry 5:823-25.

Scora, R. W., A. B. England, and W. P. Bitters.   1966.   The essential oils of Poncirus trifoliata Raf. and its selections in relation to classification.   Phytochemistry 5:1139-46.

Scora, R. W., and J. E. Newman.   1967.   The essential oils of the peel of Valencia oranges.   Agr. Meteor. 4:11-26.

Scora, R. W., and S. Torrisi.   1966.   Relation of taxonomic, climatic, and tissue maturity factors to the essential oil constituents in leaves and fruits in the Aurantiodae.   Proc. Amer. Soc. Hort. Sci. 88:262-71.

Seemann, B.   1862.   Viti: an account of a government mission to the Vitian and Fijian islands in the years 1860-61.   Macmillan & Co., Cambridge.   447 pp.

Sinclair, W. B.   1961.   The orange: its biochemistry and physiology.   Univ. Calif. Div. of Agr. Sci.   475 pp.

Singh, D., and C. A. Schroeder.   1962.   Taxonomic and physiological relationship of the so-called mandarin-lime group of citrus.   Proc. Amer. Soc. Hort. Sci. 80:291-95.

Small, J. K.   1933.   Manual of the southeastern flora.   Science Press, New York.   1554 pp.   (See specifically: Rutaceae, pp. 756-61.)

Smith, G. M.   1938.   Cryptogamic botany.   McGraw-Hill, New York.   2 vols.

Spanoche, J. B.   1841.   Prodromus Florae Timorensis.   Linnaea 15:161-208.

Sprague, T. A.   1936.   Report to the Subsection for Nomenclature.   Sixth Intern. Bot. Cong. [Amsterdam] Proc. 1:333-69.

Staner, P.   1929.   Maladies du citrus au Congo Belge.   Congo Belge Bul. Agr. 20:364-73.

Stanley, W. L.   1963a.   Citrus oils: analytical methods and compositional characteristics.   Intern. Fruchsaft-Union, Ber. Wiss.-Tech. Komm. 4:91-102.

——   1963b.   Recent developments in coumarin chemistry.   Aspects Plant Phenolic Chem., Third Symp., Univ. Toronto. 1963:79-103.

Stapf, O.   1929-31.   Index Londinensis to illustrations of flowering plants, ferns, and fern allies.   Clarendon Press, Oxford.   6 vol.

Stebbins, G. L., Jr.   1950.   Variation and evolution in plants.   Columbia University Press, New York.   643 pp.

Strasburger, E.   1878.   Ueber Polyembryonic.   Jenaische Zeitschr. f. Naturwiss. 12:647-70.

Swingle, W. T.   1909.   The limitation of the satsuma orange to trifoliate-orange stock.   U.S. Dept. Agr. Bur. Plant Indus. Circ. 46:10 pp. 1 pl.

——   1910.   New types of citrus fruits for Florida.   Proc. Fla. State Hort. Soc. 23:36-41.

——   1911.   Citrus trifoliata in relation to citrus culture.   Proc. Amer. Pomol. Soc. 32:218-21.

——   1912a.   Feroniella, genre nouveau de la tribu des Citreae, fondé sur le F. oblata, espèce nouvelle de l'Indo-Chine.   Bul. Soc. Bot. France 59:774-83.

——   1912b.   Le genre Balsamocitrus et un nouveau genre voisin Aeglopsis.   Bul. Soc. Bot. France 58(mem. 8d):225-45.

——   1912c.   Observations sur les quelques especes indo-chinoises des genres Atalantia et Glycosmis.   Not. Syst. Lecomte 2:158-63.

——   1913a.   The botanical name of the lime, Citrus aurantifolia.   Jour. Wash. Acad. Sci. 3:463-65.

——   1913b.   Chaetospermum, a new genus of hard-shelled citrous fruits, Jour. Wash. Acad. Sci. 3:99-102.

——   1913c.   Citrus ichangensis, a promising, hardy, new species from southwestern China and Assam.   Jour. Agr. Res. 1:1-14.

——   1913d.   Le fruit mûr et les jeunes semi de l'Aeglopsis Chevalieri.   Bul. Soc. Bot. France 60:406-09.

——   1913e.   New citrous fruits.   Amer. Breed. Mag. 4:83-95.

——   1913f.   Variation in first-generation hybrids (imperfect dominance): its possible explanation through zygotaxis.   Compt. Rend. Conf. Intern. Genetique IV^e [Paris, 1911] 1913:381-94.

——   1914a.   Citrus and Poncirus.   In: Sargent, C. S.   Plantae Wilsonianae.   2:141-51.

——   1914b.   Eremocitrus, a new genus of hardy drouth-resistant citrus fruits from Australia.   Jour. Agr. Res. 2:85-100.

——   1914c.   The name of the wood apple, Feronia Limonia.   Jour. Wash. Acad. Sci. 4:325-28.

——   1914-17.   Citrus and related genera.   In: Bailey, L. H.   Standard cyclopedia of horticulture.   The Macmillan Co., New York.   6 vol.   (See specifically: Key to orange subfamily, accounts of 25 genera and 4 cultivated species.   49 pp.   Also reprinted with table of contents in 1917.)

——   1915a.   Merope angulata, a salt-tolerant plant related to Citrus, from the Malay Archipelago.   Jour. Wash. Acad. Sci. 5:420-25.

——   1915b.   Microcitrus, a new genus of Australian citrous fruits.   Jour. Wash. Acad. Sci. 5:569-78.

——   1915c.   A new genus, Fortunella, comprising four species of kumquat oranges.   Jour. Wash Acad. Sci. 5:165-76.

——   1916a.   Pamburus, a new genus related to Citrus from India.   Jour. Wash. Acad. Sci. 6:335-38.

——   1916b.   Pleiospermium, a new genus related to Citrus, from India, Ceylon and Java.   Jour. Wash. Acad. Sci. 6:426-31.

——   1916c.   Severinia buxifolia, a citrus relative native to southern China.   Jour. Wash. Acad. Sci. 6:651-57.

——   1918.   Merrillia, a new rutaceous genus of the tribe Citreae from the Malay Peninsula.   Philipp. Jour Sci., Sec. C, Bot. 13:335-41, 343.

——   1922.   History of the kumquat oranges in China (list of references to Chinese works consulted).   [Compiled with the help of Michael J. Hagerty.]   4 unnumbered pp.

——   1927a.   Kankitsu kaju oyobi sono yasei kinen shokubutsu wo fokumo yukaryo no ichi aka Citrateae.   [A study of the phylogenetic relationships of the rutaceous subfamily Citrateae.]   Stud. Citrol. 1:1-10.

——   1927b.   Seed production in sterile citrus hybrids, its scientific explanation and practical significance.   New York Hort. Soc. Mem. 3:19-21.   (Abstract.)

——   1929a.   "Kindzu" or "Golden Bean" orange (Fortunella Hindsii) from historic, taxonomic and cytologic standpoints.   Proc. Third Pan-Pacific Sci. Cong. [Tokyo, 1926] 2:2001.   (Abstract.)

——   1929b.   The origin of the flora of Eastern Asia, a reservoir of useful plants.   Proc. Third Pan-Pacific Sci. Cong. [Tokyo, 1926] 2:1902-03.   (Abstract.)

——   1929c.   A study of the phylogenetic relationships of the rutaceous subfamily Citrateae, including the citrus fruits and their wild relatives, with experimental studies in hybridizing and grafting plants of this subfamily.   Proc. Third Pan-Pacific Sci. Cong. [Tokyo, 1926] 2:2013-14.   (Abstract.)

——   1931.   The Wase mutations of the satsuma oranges and their temperature requirements.   Amer. Jour. Bot. 18:891.   (Abstract.)

——   1932.   Neophyosis or rejuvenescence of nucellar bud seedlings in Citrus.   Amer. Jour. Bot. 19:839.   (Abstract.)

——   1933.   Metaxenia and neophyosis—two forms of morphogenetic influence exerted by the generation-complex of the embryo sac apparatus in higher plants.   Abstract of a paper read at Natl. Acad. Sci. meeting of April 28, 1933.   (Mimeo.)

——   1935.   Old and new criteria for determining the relationship of higher plants.   Science (n.s.) 81:464.

——   1938.   A new taxonomic arrangement of the orange subfamily, Aurantioideae.   Jour. Wash. Acad. Sci. 28:530-33.

——   1939a.   Clymenia and Burkillanthus, new genera; also three new species of Pleiospermium (Rutaceae-Audantioideae [sic]).   Jour. Arnold Arbor. 20:250-63.

——   1939b.   New methods utilized in studying the taxonomy of the orange subfamily.   Jour. Wash. Acad. Sci. 29:270.

——   1940a.   Limnocitrus, a new genus; also new species of Wenzelia, Paramignya, and Atalantia (Rutaceae-Aurantioideae).   Jour. Arnold Arbor. 21:1-24.

——   1940b.   New varieties and new combinations in the genera Clausena, Oxanthea, and Triphasia of the orange subfamily, Aurantioideae.   Jour. Wash. Acad. Sci. 30:79-83.

——   1940c.   Three new species of Citropsis; also new varieties of Atalantia and Fortunella(Rutaceae-Aurantioideae).   Jour. Arnold Arbor. 21:115-33.

——   1942.   Three new varieties and two new combinations in Citrus and related genera of the orange subfamily.   Jour. Wash. Acad. Sci. 21:23-26.

Swingle, W. T., and Maude Kellerman.   1914.   Citropsis, a new tropical African genus allied to Citrus.   Jour. Agr. Res. 1:419-36.

Swingle, W. T., and T. R. Robinson.   1923.   Two important new types of citrous hybrids for the home garden, citrangequats and limequats.   Jour. Agr. Res. 23:229-38.

Swingle, W. T., T. R. Robinson, and E. May, Jr.   1929.   The nurse-grafted Y-cutting method of plant propagation.   Jour. Hered. 20:79-94.

Swingle, W. T., T. R. Robinson, and E. M. Savage.   1931.   New citrus hybrids.   U.S. Dept. Agr. Circ. 181:20 pp.

——   1932.   Acid citrus fruits suited to Florida and the Gulf Coast region.   U.S. Dept. Agr. Bur. Plant Indus.   11 pp.   (Mimeo.)

Swingle, W. T., and H. J. Webber.   1898.   Hybrids and their utilization in plant breeding.   U.S. Dept. Agr. Yearbook 1897:383-420.

Szent-Gyorgyi, A.   1938.   Methoden zur Herstellung von Citron.   Zeitschr. f. Physiol. Chem. 255:126-31.

Talbot, W. A.   1909-11.   Forest flora of the Bombay Presidency and Sind.   Printed for the Gov't., Poona, India.   2 col.   (See specifically: Rutaceae.   1:184-206.   Figs. 117-25.)

Tanaka, T.   1922.   Citrus fruits of Japan; with notes on their history and the origin of varieties through bud variation.   Jour. Hered. 13:243-53.

——   1925.   On Canton lemon, Citrus limonia Osbeck.   Kjushu Imp. Univ. Dept. Agr. Bul. 1:106-26.   [Japanese with English title and resume.]

——   1926a.   A new species of Citrus from Formosa.   Proc. Imp. Acad. Japan 2:345-47.

——   1926b.   On the scientific name of the grapefruit.   Bul. Sci. Fak. Terk. Kjushu Univ. 2:67-83.   [Japanese with English resume.]

——   1926c.   On the Shiikuwasha orange in Okinawa, Ryukyu.   Jour. Jap. Bot. 3:190-93   [Japanese with English title.]

——   1926d.   Wild citrus of the Japanese territories.   Bul. Sci. Fak. Terk. Kjushu Univ. 2:51-58.   [Japanese with English resume.]

——   1927a.   Consideration of the genetics of the Pacific races of citrus fruits.   Mem. Tanaka Citrus Exper. Sta. l(l):50-69.

——   1927b.   On Citrus koji, Marcovitch.   Bul. Sci. Fak. Terk. Kjushu Univ. 2:190-99.

——   1927c.   Taxonomy of the citrus fruits of the Pacific region.   Mem. Tanaka Citrus Exper. Sta. l(l):15-36.

——   1928a.   On certain new species of Citrus.   Stud. Citrol. 2:155-64.   [Japanese with English and Latin resume.]

——   1928b.   Revisio aurantiacearum, I.   Bul. Soc. Bot. France 75:708-15.   (Reprinted in: Mem. Tanaka Citrus Exper. Sta. 1[21:39-46 [1932].)

——   1928c.   Revisio aurantiacearum, II. Two new genera and new combinations of Rutaceae-Aurantieae from Papua.   Jour. Arnold Arbor. 9:137-44.

——   1929a.   Chalcas, a Linnean genus which includes many new types of Asiatic Plants.   (Revisio aurantiacearum, IV.)   Jour. Soc. Trop. Agr. 1:23-44   (Reprinted as: Contr. Hort. Inst. Taihoku Univ. No. 1.)

——   1929b.   Remarks on citrus and citrus relatives in China.   Lingnan Sci. Jour. 7:337-48.

——   1930a.   Compendium des espêces indo-chinoises d'aurantiacées.   (Revisio aurantiacearum, III.)   Bul Mus. Hist. Nat. Paris, Ser. 2, 2:157-64.   (Reprinted in: Mem. Tanaka Citrus Exper. Sta. 1(2):47-54 [1932].)

——   1930b.   Enumeration of Indian species of Rutaceae-Aurantioideae.   (Revisio aurantiacearum, VI.)   Jour. Bot. 68:225-36.   (Reprinted in: Mem. Tanaka Citrus Exper. Sta. 1[2]:55-66 [1932].)

——   1931a.   The discovery of Citrus tachibana in Formosa, and its scientific and industrial significance.   Stud. Citrol. 5:1-20.   [In Japanese with English summary.]

——   1931b.   Notes on the Dutch Indian species of Rutaceae-Aurantieae.   (Revisio aurantiacearum, V.)   Mededeel. Rijks Herb. 69:1-13.

——   1932a.   Botanical discoveries on the citrus flora of China.   Mem. Tanaka Citrus Exper. Sta. 1(2):12-36.

——   1932b.   Citrus wilsonii species nova.   Mem. Tanaka Citrus Exper. Sta. 1(2):37-38.

——   1932c.   A monograph of the satsuma orange, with special reference to the occurrence of new varieties through bud variation.   Mem. Fac. Sci. Agr. Taihoku Univ. 4:1-626.

——   1932d.   Opinion of Dr. Kozhin on Citrus classification.   Stud. Citrol. 5:251-63.   [Japanese with English summary.]

——   1932e.   Philippine Rutaceae-Aurantioideae.   (Revisio aurantiacearum, VII.)   Trans. Nat. Hist. Soc. Formosa 22:418-33.

——   1933a.   General remarks on the genus Fortunella, (2).   Stud. Citrol. 6:19-40.

——   1933b.   Kankitsu no kenkyû.   (Citrus studies.)   Yokendo Shoten, Tokyo.   463 pp.

——   1935a.   History of dispute in the Citrus classification.   Stud. Citrol. 7:1-39.   [Japanese with English summary.]

——   1935b.   Kankitsusôno kigenni kansuru kenkyû.   (Studies in the origin of Citrus flora of various countries.)   Proc. Jap. Assoc. Adv. Sci. 10(2):570-76.

——   1936.   On the origin and the future of Japanese citrus flora. Stud. Citrol.   7:155-75.   [Japanese with English summary.]

——   1937.   Further revision of Rutaceae-Aurantioideae of India and Ceylon.   (Revisio aurantiacearum VIII.)   Jour. Indian Bot. Soc. 16:227-40.

——   1954.   Species problem in Citrus   (Revisio aurantiacearum, IX).   Jap. Soc. Prom. Sci., Ueno, Tokyo.   152 pp.

——   1959.   A revision of Assam citrus.   (Revisio aurantiacearum, XL).   Bul. Osaka Pref., Ser. B, 9:29-39.

——   1961.   Citrologia.   Semi-centennial commemoration papers on citrus studies.   Citrologia Supporting Foundation, Osaka, Japan.   114 pp.

Tanaka, T., and Y. Tanaka.   1932.   Propagation of citrus fruits in Japan.   Mem Tanaka Citrus Exper. Sta. 1(2):3-11   [A reprint with new pagination.]   (Translated from: Japanese text in Stud. Citrol. 3:197-907 [1930].)

Tanaka, Y.   1948.   An iconograph of Japanese Citrus fruits: a monographic study of species and varieties of Citrus fruits grown in Japan.   Yokendo Co. Ltd., Tokyo.   2 vol.

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Theulier, E.   1902.   Etude sur 1'essence de fleurs d'orangers douces ou néroli portugal.   Bul. Soc. Chimique Paris, Ser. 3, 27:278-80.

Thomas, B.   1932.   Arabia Felix; across the empty quarter of Arabia.   Scribner's, New York.   316 pp.

Thwaites, G. H. K.   1864.   Enumeratio plantarum Zeylanica.   Dulau & Co., London.   483 pp.

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Tillson, A. H.   1938.   The floral anatomy of the Aurantioideae.   Doctoral Dissertation, Univ. Maryland.   40 pp.   (Unpublished manuscript.)

Tillson, A. H., and R. Bamford.   1938.   The floral anatomy of the Aurantioideae.   Amer. Jour. Bot. 25:780-93.

Tippo, O.   1942.   A modern classification of the plant kingdom.   Chron. Bot. 7:203-06.

Tolkowsky, S.   1938.   Hesperides: a history of the culture and use of citrus fruits.   John Bale Sons & Curnow, London.   371 pp.

Toxopeus, H. J.   1936.   Die Züchtung von Unterlagen fur Citrus sinensis Osb. immun gegen Phytophthora parasitica, die Ursache der "gum-disease" in Java, Züchter 8:1-10.

Trabut, L.   1912.   Chinois et kumquat.   Rev. Hort [Paris] 84:564-67.   3 figs.

——   1914.   Le kumquat.   Bul. Agr. Alger.-Tunis.-Maroc., Ser. 2, 20:2-11.

Traub, H. P.   1936.   Artificial control of nucellar embryony in citrus.   Science (n.s.) 83:165-66.

Traub, H. P., and T. R. Robinson.   1937.   Improvement of subtropical fruit crops: citrus.   U.S. Dept. Agr. Yearbook 1937:749-826.   19 figs.   (Reprinted as: Yearbook Separate No. 1589 [1938].)

Trimen, H.   1893.   A handbook of the flora of Ceylon.   Dulae & Co., Ltd., London.   (See specifically: Rutaceae.   1:213-29, and Suppl. [1931], pp. 36-41.)

Tschirch, A., and O. Oesterle.   1893-1900.   Anatomischer Atlas der Pharmacognosie und Nahrungsmittelkunde.   C. H. Tauchnitz, Leipzig.   367 pp.   (See specifically: Citrus, pp. 299-306. pls. 69, 70 [1898].)

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——   1863.   Animadversiones ad catalogum primum et secundum partem herbarii universitatis Charkoviensis.   Bul. Soc. Nat. Mosc. 36:578.

Turner, F.   1893.   New commercial crops for New South Wales.   Agr. Gaz. N.S. Wales 4:152-57.

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——   1932.   Wissenschaftliche Beobachtungen and [sic] Versuche an Agrumen. IV. Der polygamische Zustand einiger Citrusarten.   Gartenbauwissenschaft 7:121-41.

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Voigt, J. O.   1845.   Hortus suburbanus Calcuttensis.   Bishop's College Press, Calcutta.   841 pp   (See specifically: Aurantiaceae.   pp. 138-43.)

Volckamer, J. C.   1708-14.   Nürnbergische Hesperides, oder Gründliche Beschreibung der edlen Citronat- Citronen- und Pomeranzen-Füchte…   Bei dem Authore, Nürnberg.   2 vol.

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——   1923.   Citrus-Arten.   In: Früwirth, C.   Handbuch der landwirtschaftliche Pflanzenzuchtung.   5:112-20.   Second edition.   Paul Parey, Berlin.

——   1938.   When did the sweet orange reach Europe?   U.S. Dept. Agr. Yearbook 1906:451, 480.

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——   1915.   Citrus fruits in the Philippines.   Philipp. Agr. Rev. 8:5-28.

——   1917a.   New or noteworthy tropical fruits in the Philippines, Philipp. Agr. Rev. 10:8-23.

——   1917b.   Additional observations on the citrus fruits in the Philippines.   Philipp. Agr. Rev. 10:104-15.

——   1924.   The food plants of the Philippines.   Third revised edition.   Philipp. Bur. Agric. Bul. 39:246 pp.

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