New directions in the theory of graphs :  proceedings of the Third Ann Arbor Conference on Graph Theory held at the University of Michigan, October 21-23, 1971 / 
edited by Frank Harary. 
 - New York :  Academic Press,  1973. 
 - xiii, 325 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>012324255X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Graph theory--Congresses.