1. Greep, R. O., Fevold, H.L. and Hisaw, F.L., Anat. Rec., 65: 261, 1936.
2. Greep, R.O. and Fevold, H.L., Endocrinology, 21: 611, 1937.
3. Greep, R.O. In Sex and Internai Secretion, 3rd ed., ed. Young, W.C., Williams and Wilkins, Co., Baltimore, Maryland, Vol. 1, p 240, 1961.
4. Burgos, M.H., Vitale-Calpe, R. and Russo, J. In Gonadotropins 1968, ed. Rosemberg, E., Geron-X, Inc., Los Altos, California, p 213, 1968.
5. Mancini, R.E., Siegueur, A.G. and Perez Lloret, A. In Gonadotropins 1968, ed. Rosemberg, E., Geron-X, Inc., Los Altos, California, p 503, 1968.