1. Karnofsky, D. A., Ann. Rev. Pharmacol., 5, 447 (1965).
2. Tuchmann-Duplessis, H., in Biological Council Symposium on Embryopathic Activity of Drugs, 56 (J. and A. Churchill Ltd, London, 1965).
3. Larsson, K. S., and Eriksson, M., Acta Paediat. Scand., 55, 569 (1966).
4. Swartz, D. P., Napolitani, F. D., and Patchell, R. D., Amer. J. Obstet. Gynec., 94, 506 (1966).
5. Watson, B. P., Amer. J. Obstet. Gynec., 1, 70 (1920).