TY  - BOOK
AU  - Tiwari,N K  .
TI  - Operations research / 
SN  - 978-81-203-2966-9
U1  - 658.4034 
PY  - 2009///
CY  - New Delhi : 
PB  - PHI Learning Pvt. Ltd. , 
KW  - Operations research
ER  -