TY  - BOOK
AU  - Gupta, Prem Kumar
AU  - Hira, D. S.
TI  - Operations  Research
SN  - 9788121902816
U1  - 003/GUP/O 
PY  - 2016///
PY  - 2018///
CY  - New Delhi
PB  - S. Chand 
KW  - Operations  Research
ER  -