TY  - BOOK
AU  - Gupta,Prem Kumar 
AU  - Hira,D.S
TI  - Problems in operations research: principles and solutions 
SN  - 8121909686
U1  - 003 23
PY  - 2003///
CY  - New Delhi : 
PB  - S.Chand
KW  - Programming
ER  -