operation research : An introduction 
Taha, Hamdy A. 
 - Third edition. 
 -  McMillan Publishing Co., Inc.  1982 
 - 848 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>9-71105516-3 
<br/><br/><label>Dewey Class. No.: </label>001.424 T13 1982