Wilson, Robert A <br/><br/>
Graphs, colourings and the four-colour theorem 

 - Oxford  Oxford Uni Pr  2002 
 - viii; 141p;pbk 
<br/><br/><label>ISBN: </label>0-19-851062-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Graph coloring<br/>Four-color problem<br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>511.5/WIL