TY  - BOOK
AU  - United Nations International Economic and Social Affairs (Deptt. of-)
ED  - United Nations International Economic and Social Affairs (Deptt. of-)
TI  - Fertility levels and trends as assessed from twenty world fertility surveys
U1  - "Y:5231.1s, M3/UN" 
PY  - 1983///
CY  - NY
PB  - UN       
KW  - Fertility
ER  -