TY  - BOOK
ED  - World Health Organisation(WHO)
TI  - Biology of fertility control by periodic abstinence: report of a WHO scientific group
T2  - World Health Organisation Technical Report Series; No.360
U1  - 100 SD:610.621 
PY  - 1967///
CY  - Geneva
PB  - WHO
KW  - Sexual abstinence
KW  - FAO
KW  - WHO
ER  -