TY  - BOOK
AU  - Gupta ,C.B
AU  - Vijay Gupta
TI  - An introduction to statistical methods 
SN  - 9788125916543
AV  - H529.H24  2004 
PY  - 2004///
CY  - New Delhi, India
PB  - Vikas publishing house PVT Ltd
ER  -