TY  - BOOK
AU  - Gupta, P K
AU  - Gupta, P K
AU  - Hira, D S
TI  - Problems in operations research: principles and solutions
SN  - 9 788121 909686
U1  - 519.8 GUP 
PY  - 2003///
CY  - New Delhi
PB  - S Chand & Company
ER  -