The theory and applications of graphs :  fourth international conference, May 6-9, 1980, Western Michigan University, Kalamazoo / 
edited by G. Chartrand ... [et al.] 
 - New York :  John Wiley & Son,  1981. 
 - xvi, 611 pages :  illustrations ;  24 cm. 
<br/><br/>Includes bibliographies 
<br/><br/><label>ISBN: </label>0471084735 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Graph theory--Congresses