TY  - BOOK
ED  - India. National Sample Survey Organisation
TI  - Instructions to field workers: national sample Survey: 1957-58
U1  - 000SC:300(54) 
PY  - 1957///
CY  - Calcutta
PB  - ISI
KW  - Field workers
N1  - V 1: Concepts, definitions and procedures
ER  -