TY  - BOOK
ED  - United Nations.
ED  - United Nations
TI  - Population newsletter: No. 20 
T2  - Population Studies / United Nations. Dept. of Economic and Social Affairs
AV  - HB848.U54 no.31
U1  - 312 
PY  - 1975///.
CY  - New York
PB  - United nations
KW  - Population forecasting
N1  - United Nations. Document ST/SOA/Ser. A/31
ER  -