TY  - BOOK
ED  - WHO Scientific Group on Hormonal Steroids in Contraception
ED  - World Health Organization ,
TI  - Report: Geneva, 23-27 October 1967  
U1  - 616.9 23
PY  - 1968///
CY  - Geneva
PB  - World Health Organization
KW  - Contraception
KW  - Steroids
KW  - Estrogen
ER  -