Graph colourings 
Roy Nelson, Robin J. Wilson 
 - New York  Longman scientific & technical  1990 
 - 143 p  fig  25 cm 
 - Pitman research notes in mathematics series  218 .
<br/><br/> Contine bibliogr. dupa capitole 
<br/><br/><label>ISBN: </label>0582051207 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Graph theory