Gay, David <br/><br/>
Explorations in Topology :  map coloring, surfaces and knots 
/ by David Gay 
 - New York  Elsevier Academic  2007 
 - xii,339p. 
<br/><br/><label>ISBN: </label>9780123708588 
<br/><br/><label>Dewey Class. No.: </label>514  / GAY/E