TY  - BOOK
AU  - Chadha,S.S.,
AU  - Agarwal,R.N.
TI  - Practical statistics
U1  - 519.5 
PY  - 1983///
CY  - New delhi
PB  - S. Chand & company ltd.
KW  - Commerce
KW  - Practical statistics
ER  -