TY  - BOOK
ED  - World Fertility Survey Conference
TI  - Sampling for national fertility surveys
U1  - 304.632 WOR 
PY  - 1980///
CY  - The Hague
PB  - International Statistical Institute
KW  - Fertility, Human
KW  -  Congresses
KW  - Birth control
N1  - Includes bibliographic references
ER  -