Hochbaum, Dorit S.   ed. <br/><br/>
Approximation algorithms for NP-Hard problems   

 - Boston  PWS Publishers  1997 
 - xii, 596p. Bibl. Index. 
<br/><br/>  
<br/><br/><label>ISBN: </label>0534949681 
<br/><br/><label>Dewey Class. No.: </label>518.50181  / H685.AA