Combinatorial theory and its applications I 

 - London:   North-Holland Publishing Company,   1970 
 - 390p. 
<br/><br/><label>ISBN: </label>720420377 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial analysis
<br/><br/><label>Universal Decimal Class. No.: </label>519.1(082.2)  / L0.1