1. Sex Differentiation and Development (edit. by Austin, C. R.), Mem. Soc. Endocrin. No. 7 (1960). Edwards, R. G., Ferguson, L. C., and Coombs, R. R. A., J. Reprod. Fertil., 7, 153 (1964). Schilling, E., ibid., 11, 469 (1966). Bhattacharya, B. C., Bangham, A. D., Cro, J., and Keynes, R. D., Nature, 211, 863 (1966).
2. Edwards, R. G., Lancet, ii, 926 (1965). Edwards, R. G., Sci. Amer., 215, 73 (1966).
3. Melander, Y., Hereditas, 48, 645 (1962).
4. Chang, M. C., Science, 111, 544 (1950).
5. Edwards, R. G., and Gardner, R. L., Nature, 214, 576 (1967).