TY  - BOOK
AU  - GUPTA, PREM KUMAR
AU  - HIRA, D.S
TI  - OPERATIONS RESEARCH
T2  - EC
U1  - 658.403 GUP 
PY  - 2023///
CY  - NEW DELHI
PB  - S. CHAND & COMPANY PVT. LTD.
KW  - OPERATIONS RESEARCH
ER  -