Combinatorial structures and their applications :  proceedings of the Calgary International Conference on Combinatorial Structures and Their Applications held at the University of Calgary, June 1969 . Alberta, Canada / 
Editorial Committee Richard Guy, Hain Hanani, Norbert Sauer, Johanan Schonheim 
 - New York :  Gordon and Breach Science Publishers,  1970 
 - 508 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>LCCN: </label>78-111302 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial analysis--Congresses