The theory and applications of graphs  fourth International Conference May 6-9, 1980 Western Michigan University, Kalamazoo, Michigan 
ed. by G. Chartrand ... (et al.) 
 - New York:  John Wiley & Sons,  1981. 
 - 611pages :   illustrations ;   23cm 
<br/><br/><label>ISBN: </label>0471084735 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Graph theory--Congresses.