TY  - BOOK
AU  - Prem Kumar Gupta
AU  - Gupta,Prem Kumar  .
AU  - Hira,D S   .
TI  - Introduction to operations research / 
SN  - 81-219-0810-8
U1  - 658.4034 
PY  - 1999///
CY  - New Delhi : 
PB  - S Chand and company  , 
KW  - Operations research
ER  -