TY  - BOOK
AU  - Devi Prasad
TI  - Operation research
U1  - 658.403 D495O 
PY  - 2015///
CY  - New Delhi
PB  - Narosa Publishing House
N1  - 4506 27/01/2022 HBD22/9228 28/01/2022 Main Budget
ER  -