Wallis, W. D. <br/><br/>
Introduction to Combinatorics/ 
Wallis W.d. Et. Al 
 -  Chapman and Hall/crc, 
<br/><br/><label>ISBN: </label>9781439806227 
<br/><br/><label>Subjects--Topical Terms: </label><br/>General
<br/><br/><label>Dewey Class. No.: </label>511.6  / WAW