TY  - BOOK
ED  - India. National Sample Survey Office
TI  - NSS 23th round : July 1968-June 1969 ; Instructions
U1  - 311.2 21st
PY  - 1968///
CY  - Calcutta
PB  - The Authors
KW  - Sampling (Statistics)
N1  - Contents: v.1. Desing, concepts, definitions and procedures
ER  -