Combinatorics / 
edited by A.Hajnal and Vera T.Sos 
 - Amsterdam :  North-Holland Publishing Co.,  1978 
 - 2v. ;  25 cm. 
 - Colloquia mathematica Societatis Janos Bolyai ;  18 .
<br/><br/>Includes bibliographies 
<br/><br/><label>ISBN: </label>044485093 
<br/><br/><label>LCCN: </label>78-322526 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial alaysis--Congresses