TY  - BOOK
AU  - United Nations. Department of Economic and Social Affairs.
TI  - Levels and trends of fertility throughout the world , 1950-1970
T2  - Population studies; no.59
U1  - DB 
PY  - 1977///
CY  - New York
PB  - United Nations
KW  - Fertility, Human
KW  - Fertility
KW  - Human Fertility
KW  - Differential Fertility
KW  - Fertility-Sources of Data
ER  -