TY  - BOOK
AU  - Gupta, Prem Kumar
AU  - Hira, D. S.
TI  - Operations research
SN  - 9788121902816
U1  - 001.424 G9592o 
PY  - 1976///
CY  - New Delhi
PB  - S. Chand & Company Pvt. Ltd.
KW  - Operations research
KW  - Research
KW  - Quality control
ER  -