Brualdi, Richard A. <br/><br/>
Introductory combinatorics / 
Richard A. Brualdi 
 - 4th ed. 
 - Upper Saddle River, N.J. :  Pearson/Prentice Hall,  2004 
 - ix, 630 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0131001191  RM375.19 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial analysis