TY  - GEN
AU  - COCHRAN, WILLIAM G
TI  - SAMPLING TECHNIQUES
U1  - 001.433 COC/SA 
CY  - NEW YORK, JOHN WILEY & SONS
KW  - ESTIMATION OF SAMPLE SIZE
KW  - SAMPLING PROPORTIONS AND PERCENTAGES
KW  - SIMPLE RANDOM SAMPLING
ER  -