Colloquium on Combinatorics, Universite de Montreal, June 11-16, 1979 <br/><br/>
Combinatorics, 1979; proceedings in 2 pts.  / 

 - Amsterdam:  North-Holland,  1980 
 - 
 - Annals of Discrete Mathematics   8 .
<br/><br/><label>Dewey Class. No.: </label>511.6  / C714.CN