TY  - BOOK
AU  - Gupta,S.P., x
AU  - x
TI  - Practical statistics: x
SN  - 8121306245
U1  - 310/G796p 
PY  - 1990///
CY  - New Delhi
PB  - S. Chand.
KW  - Statistics
N1  - x
ER  -