1. Foster, C. L., NATURE, 151, 277 (1943).
2. Foster, C. L., J. Endocrinol, 3, 244 (1943).
3. De Robertis, E., Revista Medica Latino-Americana, No. 323 (1942).
4. Severinghaus, A. E., in "Sex and Internal Secretions", edited by Allen, E. (1939).
5. Horning, E. S., J. Endocrinol., 3, 260 (1943).