TY  - BOOK
ED  -  World Fertility Survey.
TI  -  Modifications to the WFS core questionnaires and related documents
U1  -  001.4222 
PY  - 1977///
CY  -  London
PB  -  International Statistical Institute
KW  -  World fertility survey
N1  -  "Errata" slip, [1] leaf inserted
ER  -