Fritsch, Rudolf and Fritsch, Gerda <br/><br/>
The four-color theorem; history, topological foundations, and idea of proof   
Tr. from German by Julie Peschke 
 - New York  Springer-Verlag  1998 
 - xvi, 260p. Index, Bibl. 
<br/><br/> "Purchased under NBHM grant for the year 1998-99"   
<br/><br/><label>Dewey Class. No.: </label>511.5  / F919.FC