TY  - BOOK
AU  - Gupta, C. B.
TI  - An introduction to statistical methods
SN  - 0706919696
U1  - 519.5   
PY  - 1957///
CY  - New Delhi
PB  - Vikas Publishing House Pvt. Ltd.
KW  - Statistics
KW  - Collection of data
KW  - Sampling
KW  - Classification and tabulation
ER  -