TY  - BOOK
AU  - GUPTA, PREM KUMAR
AU  - HIRA, D. S.
TI  - OPERATION RESEARCH
SN  - 8121920819
U1  - 658.403 4/GUP/HIR 
PY  - 2014///
CY  - NEW DELHI.
PB  - S. CHAND & CO. LTD., NEW DELHI.
ER  -