TY  - BOOK
ED  - World Health Organisation (WHO)
TI  - Advances in methods of fertility regulation: report of a WHO scientific group
T2  - World Health Organisation Technical Report Series; No.527
U1  - 610.621 
KW  - Fertility--Effect of drugs on
KW  - WHO
KW  - Birth control
KW  - Oral contraceptives
ER  -