Wallis, W. D. <br/><br/>
Introduction to combinatorics / 
W.D. Wallis, J.C. George. 
 - Boca Raton :  Chapman & Hall/CRC,  2010. 
 - p. cm. 
 - Discrete mathematics and its applications .
<br/><br/><label>ISBN: </label>9781439806227 (hardcover : alk. paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial analysis
<br/><br/><label>Dewey Class. No.: </label>519.11  / WAL