Wilson, Robert,  1958- <br/><br/>
Graphs, colourings, and the four-colour theorem/ 
Robert A. Wilson. 
 - Oxford:  New York:  Oxford University Press,  2002. 
 - viii, 141 p.:  ill.;  24 cm. 
 - Oxford science publications .
<br/><br/>Includes bibliographical references (p. 136-138) and index. 
<br/><br/><label>ISBN: </label>0198510624 (acid-free paper) 0198510616 
<br/><br/><label>LCCN: </label>00231918 
<br/><br/><label>Nat. Bib. No.: </label>GBA2-21507 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Four-color problem.<br/>Graph theory.
<br/><br/><label>Dewey Class. No.: </label>511.5  / W752g