References
- Hatcher , R A , Stewart , G K Stewart , F . 1980 . Contraceptive Technology 1980–1981 , 83 – 85 . New York : Irvington Publishers Inc. .
- Wortman , J . 1976 . The diaphragm and other intra-vaginal barriers. A Review H70 – H72 . Population Reports Series H, no. 4
- Willis , M S . 1979 . Cervical Caps: Old and yet too new . Science News , 116 : 431
- Lehrman , S . January 31 1980 . “ Birth control option? ” . In The Daily Calfornian January 31 , 13 – 14 .
- Tietze , C , Lehfeldt , H and Liebmann , H G . 1953 . The effectiveness of the cervical cap as a contraceptive method . Obstet Gynecol , 66 : 904 – 908 .
- Lehfeldt , H , Sobrero , A J and Inglis , W . 1961 . Spermicidal effectiveness of chemical contraceptives used with the firm cervical cap . AM J Obstet Gynecol , 82 : 446 – 448 .
- National Institutes of Health . December 10 1979 . Use effectiveness studies of cervical caps December 10 , Betesda, MD Request of proposals NicHD-CD-80–7
- Lehfeldt Hans, M.D., New York, N.Y.; Greenwood, Sadja, M.D., San Francisco, CA; Stewart, Felicia, M.D., Sacramento, CA; Koch, James P., M.D., Brookline, Mass.; Goldbaum, Laura, R.N., San Francisco, CA: Emma Goldman Clinic for Women, Iowa City, Iowa; Bernstein, Jessica, R.N., Berkeley, CA
- Kammula and Raju , D. V.M. Division of OB-GYN and Radiology Devices , Department of HEW, Public Health Service, FDA . Ph.D., 8757 Georgia Avenue, Silver Spring, Maryland. 20910