TY  - BOOK
AU  - Gupta, Pik
TI  - Operational research
SN  - 9788121902816
AV  - T57.6.A2.G86 2019 
PY  - 2019///
CY  - New Delhi
PB  - S Chand and company
KW  - Operation research
N1  - Includes appendixes and index
ER  -