TY  - BOOK
AU  - Gupta, Prem Kumar
TI  - Operations research
U1  - 658.4034 G959O(7) 
PY  - 2019///
CY  - New Delhi
PB  - S Chand
N1  - 4433 20/01/2022 HBD19/8004 19/11/2019 Main Budget
ER  -