1. Allen, W. R., J. Endocr., 43, 593 (1969).
2. Cole, H. H., and Goss, H. T., in Essays in Biology in Honour of H. M. Evans, 107 (Univ. Calif. Press, California, 1943).
3. Clegg, M. T., Boda, J. M., and Cole, H. H., Endocrinology, 54, 448 (1954).
4. Bielanski, W., Ewy, Z., and Pigoniowa, H., Third Int. Cong. Anim. Reprod., 110 (1956).
5. Clegg, M. T., Cole, H. H., Howard, C. B., and Pigon, H., J. Endocrinol., 25, 245 (1962).