TY  - BOOK
AU  - Tiwari, N.K.
AU  - Shandilya, shishir K.
TI  - Operations research
SN  - 9788120329669
U1  - 003 TIW-O 
PY  - 2009///
CY  - New Delhi
PB  - PHI Learning Pvt. Ltd.,              New Delhi
ER  -