TY  - BOOK
AU  - Gupta, P. K.
AU  - Hira, D. S.
TI  - Problems in Operations Research: Principles and Solutions
SN  - 9788121909686
U1  - 658.4034 
PY  - 1995///
CY  - New Delhi
PB  - S. Chand & Company Ltd.
ER  -