TY  - BOOK
AU  - Cochran,William G., x
AU  - x
TI  - Sampling techniques: x
SN  - x
U1  - 311.21/COS 
PY  - 1963///
CY  - N.Y.
PB  - John Wiley
KW  - Sampling(Statistics)
KW  - Probabilities
N1  - x
ER  -