TY  - BOOK
AU  - Gupta, P. K
AU  - Hira D.s. Dr
TI  -  Problems in Operations Research:  principles and solutions
SN  - 8121909696
AV  - T 57.6  .G87
PY  - 1991///
CY  - New Delhi
PB  -  S. Chad & Company
KW  -   operations research
ER  -