TY  - BOOK
AU  - Gupta, Prem Kumar
AU  - Hira , D.S.
TI  - Problems in Operations Research: Principles and Solutions edited by 
SN  - 9788121909686
U1  - 658.4034 
PY  - 1991///
CY  - New delhi
PB  - S.Chand
KW  - Operations research
ER  -