Symposium on Combinatorial Structures and their applications, Villa Madruzzo, October 20-25, 1980 <br/><br/>
Combinatorial and geometric structures and their applications  ; papers / 

 - Amsterdam:  North-Holland,  1982 
 - viii, 292p. 
 - Annals of Discrete Mathematics   14 .
<br/><br/><label>Dewey Class. No.: </label>516  / Sy989.CG