Combinatorial theory and its applications / 
edited by P. Erdos, A. Renyi and Vera T. Sos 
 - Budapest :  Janos Bolyai Mathematical Society,  1970 
 - v. ;  25 cm. 
 - Colloquia mathematica Societatis J. nos Bolyai ;  4 .
<br/><br/><label>ISBN: </label>0720420377 
<br/><br/><label>LCCN: </label>73-140486 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial analysis--Congresses