TY  - BOOK
AU  - Prem Kumar Gupta.
AU  - Hira, D S.
TI  - Operations research
SN  - 978-81-219-0281-6
U1  - 658.4034 
PY  - 2014///
CY  - New Delhi
PB  - S Chand & Co.
KW  - Operations research
ER  -