TY  - BOOK
AU  - Gupta, Prem Kumar.
AU  - Hira, D.S.
TI  - Problems in operations research : principles and solutions
SN  -  	8121909686 ;9788121909686
U1  - 3 
PY  - 1991///
CY  - New Delhi
PB  - S. Chand
KW  - Operations Research
ER  -