Amer. Naturalist, 1916. Vol. 50, pp. 705f.

2. Goldschmidt, R. Preliminary Report on Further Experiments in
Inheritance and Determination of Sex. Proc. Nat. Acad. Sc, 1916.
Vol. II, No. 1, pp. 53f.

3. Goldschmidt, R. A Case of Facultative Parthenogenesis. Biol.
Bulletin, 1917. Vol. XXXII, No. 1, p. 38.

4. Goldschmidt, R. Intersexuality and the Endocrine Aspect of Sex.
Endocrinology, Vol. I, p. 434. 1917. Fine summary of the work done on
moths, birds and various forms by many biologists.

5. Riddle, Dr Oscar. Quantitative Basis of Sex as indicated
by the Sex-Behaviour of Doves from a Sex-Controlled Series. Science,
n.s., Vol. 39, p. 440, 1914.

6. Riddle, Dr Oscar. Sex Control and Known Correlations in Pegeons.
Amer. Nat. Vol. L, pp. 385-410.

7. Benedict, F.G. & Emmes, L.E. A Comparison of the Basal Metabolism of
Men and Women. Jour. Biol. Chem. Vol. 20. No. 3. 1914.

8. Schäfer, Sir E.A. Endocrine Glands and Internal Secretions. Stanford
University, 1914, p. 91.

9. Paton, D. Noël. Regulators of Metabolism. London, 1913, p. 146.

10. Weininger, Otto. Sex and Character. London & N.Y., 1906. Eng. trans.
of Geschlecht u. Charakter, Vienna & Leipzig, 1901 & 1903.