Buffa, Elwood S. <br/><br/>
Management science :  operations research / 
Elwood S. Buffa, James S. Dyer 
 - New York :  John Wiley & Sons,  1981       
 - 718 p. 
<br/><br/><label>ISBN: </label>0471058513 
<br/><br/><label>LC Class. No.: </label>HD 30.19 B929m 1981