TY  - BOOK
ED  - World Health Organization
TI  - Advances in methods of fertility regulation : report of a WHO Scientific Group 
T2  - World Health Organization technical report series ; no. 575
SN  - 924120575X
U1  - 100 SD:610.621 
PY  - 1975///
CY  - Geneva
PB  - World Health Organization
KW  - Contraceptives, Oral, Hormonal
KW  - Contraception
KW  - Fertility
ER  -