TY  - BOOK
ED  - WHO Study Group on Rheumatic Fever and Rheumatic Heart Disease.
TI  - Natural family planning: a guide to provision of services
SN  - 9241542411
PY  - 1988///
CY  - Geneva
PB  - World Health Organization
KW  - Community health services
KW  - Contraception
KW  - methods
KW  - Family planning
ER  -