Harary, Frank <br/><br/>
Graph theory  / 

 - New Delhi:  Narosa,  2001 
 - xi, 286p. Bibl. Index. 
<br/><br/> "With a foreword and an appendix on the the Four colour theorem by V. Krishnamurthy" 
<br/><br/><label>ISBN: </label>0201410338 
<br/><br/><label>Dewey Class. No.: </label>511.5  / H323.GT