TY  - BOOK
AU  - Gupta, P. K.
AU  - D S Hira
TI  - Problems in operations research: principles and solutions
SN  - 9788121909686
AV  - T57.6  .G87 2013
PY  - 2013///
CY  - New Delhi : 
PB  - S. Chand, 
KW  - Operations research
ER  -