—— ——, 1909. On the sex of hybrid birds. Biol. Bull., XVI.

—— ——, 1909. La livré e du plumage chez les hybrids de pinta de et de poule. Bull. du Museum. d’hist. Nat. No. 1.

—— ——, 1910. Accessory chromosome in man. Biol. Bull., XIX.

Guthrie, C. C., 1911. On evidence of some influence in offspring from engrafted ovarian tissue. Science, XXXIII.

Hadley, P. B., 1913. Studies on inheritance in poultry. 1. The constitution of the White Leghorn breed. Bull. Agr. Exp. Station of the Rhode Island State College, No. 155.

—— ——, 1914. 11. The factor for the black pigmentation in the White Leghorn breed. Bull. Agr. Exp. Station of the Rhode Island State College, No. 161.

Halban, J., 1903. Die Entstehung der Geschlechtscharaktere. Arch. f. Gynäkologie, LXX.

Hanau, A., 1897. Versuche über den Einfluss der Geschlechtsdrüsen und die secundären Sexualcharactere. Arch. f. ges. Phys., LXV.

Harris, J. A., A. F. Blakeslee, and W. E. Kirkpatrick, 1918. The correlation between egg production during various periods of the year in domestic fowl. Genetics, III.

Hegar, A., 1903. Korrelation der Keimdrüsen und Geschlechtsbestimmung. Beiträge zur Geburtshilfe und Gynäkologie, VII.