TY  - BOOK
AU  - Ravindran,A .
AU  - Phillips,Don T  .
AU  - Solberg,James J  .
TI  - Operation research :principles and practice / 
SN  - 047185980X
U1  - 003 
PY  - 1987///
CY  - New york : 
PB  - john wiley and sons , 
KW  - OPERATION RESEARCH
N1  - Includes index
ER  -