TY  - BOOK
AU  - COCHRAN (William G)
TI  - Sampling techniques: Ed 3
SN  - 978-81-265-1524-0
U1  - 001.4222 COCS 
PY  - 2012///
CY  - New Delhi
PB  - John Wiley & Sons
KW  - General
KW  - Research
ER  -