TY  - BOOK
AU  - Gupta,P.K.
AU  - Mohan, Man.
TI  - Problems in operations research: methods and solutions 
SN  - 8170143594
U1  - 003 22
PY  - 1997///
CY  - New delhi
PB  - Sultan Chand & Sons
KW  - Operations research
ER  -