David P. Williamson, <br/><br/>
Design of approximation algorithms / 
David P. Williamson and David B. Shmoys 
 - New York :  Cambridge University Press,  2011. 
 - xi, 504 p. :  ill. ;  25 cm. 
<br/><br/>Including bibliography and index. 
<br/><br/><label>ISBN: </label>9780521195270 
<br/><br/><label>Dewey Class. No.: </label>518.5  / WIL/D