TY  - BOOK
AU  - Gupta, Prem Kumar 
AU  - Hira, D. S.
TI  - Problems In Operations Research: (Principles and Solutions)
U1  - 658.4034 G896p 1991 
PY  - 1991///
CY  - New Delhi
PB  - S. Chand & Company LTD.
N1  - Pharmacy
ER  -