Wilson, Robert <br/><br/>
Graphs, colourings, and the four-colour theorem 
Robert A. Wilson 
 - Oxford  Oxford University Press  2002 
 - viii, 141 p. : ill. ; 24 cm., : acid-free paper 
<br/><br/> Includes bibliographical references (p. 136-138) and index 
<br/><br/><label>ISBN: </label>9780198510628 
<br/><br/><label>ISSN: </label>2002319187 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Four-color problem<br/>Graph coloring
<br/><br/><label>Dewey Class. No.: </label>511.5 WIL