TY  - BOOK
AU  - Gupta, P. K.
AU  - Hira, D. S.
TI  - Operations research / 
SN  - 9788121902816
U1  - 658.4034 
PY  - 2018///
CY  - New Delhi
PB  - S. Chand & Co.
KW  - Operations research
ER  -