Hartsfield, Nora. <br/><br/>
Pearls in graph theory :  : a comprehensive introduction / 
/ Nora Hartsfield, Gerhard Ringel. 
 - Boston :  : Academic Press,  , c1990. 
 - ix, 246 p. :  : ill. ;  ; 24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0123285526 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Graph theory.