TY  - BOOK
AU  - TIWARI, N.K. AND SHANDILYA, SHISHIR K.
TI  - OPERATIONS RESEARCH 
SN  - 9788120329669
U1  - 658.4034 SHI 
PY  - 2009///
CY  - NEW DELHI
PB  - PHI LEARNING
ER  -