Wallis, W. D <br/><br/>
Introduction to combinatorics 

 - Boca Raton  CRC Press  2011 
 - xvi,380 p. 
 - Discrete Mathematics and Its Applications .
<br/><br/><label>ISBN: </label>9781439806227 
<br/><br/><label>Subjects--Topical Terms: </label><br/>COMBINATORIAL ANALYSIS<br/>MATHEMATICS
<br/><br/><label>Dewey Class. No.: </label>511  / WAL