Stanley/Fomin <br/><br/>
Enumerative Combinatorics 

 -  Cambridge University Press  Cambridge University Press  1999 
<br/><br/><label>ISBN: </label>9780511609589 
<br/><br/><label>Source: </label>EBOOK 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics