TY  - BOOK
AU  - Gupta, Prem Kumar .
AU  - Hira, D.S
TI  - Problems in operations research ( principles) and solutions
U1  - 519.5 
PY  - 1993///
CY  - New Delhi
PB  - S.Chand
KW  - Graphical methods
KW  - Linear programming
KW  - Operation research- Mathematics
ER  -