TY  - BOOK
AU  - Gupta, Prem Kumar 
AU  - Hira,  D.S.
TI  - Problems in Operations Research
SN  - 8121909686 
U1  - 519.8 
PY  - 1991///
PY  - 1997///
CY  - New Delhi : 
PB  - S. Chand, 
KW  - Operations research
N1  - Reprinted with corrections 1995
ER  -