1. BIENIARZ, J., MOTEW, M., SCOMMEGNA, A.: Obstet. Gynec. 40, 65 (1972).
2. FOX, T. J., BROOKER, L. G. S., HESELTINE, B.: Proc. Mayo-Clin. 32, 18 (1957).
3. EPSTEIN, T. E., STAUPFER, M., BEISER, G. D.: Circulation 31, 524 (1968).
4. Scommegna, A., Chattoraj, S. C.: Amer. J. Obstet. Gynec. 99, 1087 (1967).
5. SCOMMEGNA, A., KULKARNI, B.: Plasma unconjugated estriol determination in pregnancy by solvent partition and radioimmunoassay. (In preparation).