Wallis W D <br/><br/>
Introduction to combinatorics. 
Wallis W D; George J C 
 - Boca Raton   CRC Press       2011 
 - xvi,380p.  cm. 
<br/><br/><label>ISBN: </label> 3685.7627000000002 
<br/><br/><label>Standard No.: </label>111416 
<br/><br/><label>Source: </label> 3699, 07/03/2011, New India Book Agency  Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>B217, Q1