1. Makepeace, A. W., Weinstein, G. L. and Friedman, M. H. (1937). The effect of progestin and progesterone on ovulation in the rabbit. Am. J. Physiol., 119, 512
2. Greenblatt, R. B. (1952). Progesterone. In Office Endocrinology, p. 373 ( Springfield, III: Charles C. Thomas )
3. Kurzrok, R. (1937). The prospects for hormonal sterilization. J. Contracept., 2, 27
4. Albright, F. (1945). Disorders of the female gonads. In J. H. Musser (ed.), Internal Medicine — its Theory and Practice (Philadelphia: Lea and Febiger). Quoted in Editorial, Hum. Fert., 10, 80 ( 1945 )
5. Haberlandt, L. (1921). Ueber hormonale Sterilisierung des wiblichen Tierkörpers. Munch. Med. Wochenschr., 68, 1577