TY  - BOOK
AU  - Gupta, P. K.
AU  - Hira, D.S.
TI  - Problems in operations research: principles and solutions 
U1  - 658.403 G896p 2017 22
PY  - 1991///
PY  - 2017/// [Reprint]
CY  - New Delhi
PB  - S. Chand & Company Ltd
KW  - Operations research
N1  - Mathematics
ER  -