TY  - BOOK
AU  - Ravindran, A Philips,Don, T etal 
TI  - Operations research: Principles and practice 
SN  - 9971-51-302-1 
U1  - 003 RAV  
PY  - 2001///
CY  - John wiley & sons 
PB  - New York 
KW  - OPERATION RESEARCH
ER  -