TY  - BOOK
AU  - GUPTA P K
TI  - PROBLEMS IN OPERATIONS RESEARCH( METHODS AND SOLUTIONS) 
SN  - 81-8054-030-8
U1  - 658.4034 GUP/MAN 
PY  - 2003///
CY  - NEW DELHI
PB  - SULTAN CHAND AND SONS
ER  -