Garey, Michael R. Johnson, David S. <br/><br/>
Computers and Intractability:  A Guide to the Theory of NP-Completeness/ 
Michael R. Garey and David S. Johnson. 
 - New York:  W. H. Freeman and Company,  c.1979 
 - x, 338p. 
<br/><br/><label>ISBN: </label>9780716710455 
<br/><br/><label>Dewey Class. No.: </label>519.4  / GAR/C