Frank Harary <br/><br/>
Proof techniques in graph theory 

 - New York  Academic Press  1969 
 - 330p 
<br/><br/>Frank Harary: Proof techniques in graph theory.  New York.  Academic Press, 1969.--(511.5HAR)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>Dewey Class. No.: </label>511.5  / HAR