TY  - BOOK
AU  - Gupta C B
AU  -  Ratna V
TI  - Statistical calculations Ed 2
U1  - B28, K8 
PY  - 1968///
CY  - Agra
PB  - Ram Prasad and Sons       
KW  - Statistics
N1  - Appendixes : P 572-592
ER  -