Operation research : an introduction 
Taha, Hamdy A. 
 - Seventh edition. 
 -  Pearson Education, Inc.,  2003 
 - xvii, 830 pages. 
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<br/><br/><label>ISBN: </label>0-13-048808-9 
<br/><br/><label>Dewey Class. No.: </label>658.4034 T13o 2003