TY  - BOOK
AU  - Gupta, Prem Kumar
AU  - Hira, D. S. 
TI  - Operations Research
SN  - 9788121902816
U1  - 658.4034 GUP/O 
PY  - 2013///
CY  - New Delhi 
PB  - S. Chand & Company
KW  - Operations Research
ER  -