TY  - BOOK
AU  - GUPTA (Prem Kumar)
AU  - HIRA (D S)
TI  - Operations research
SN  - 8121902819
U1  - 001.424 GUPO 
PY  - 2012///
CY  - New Delhi
PB  - S. Chand & Co. Ltd.
KW  - research
KW  - Operations
ER  -