Richard P. Stanley <br/><br/>
Enumerative Combinatorics: Volume 1 

 - 2nd ed 
 -  Cambridge University Press  2012 
 - Cambridge Studies in Advanced Mathematics .
<br/><br/><label>ISBN: </label>9781107015425 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Discrete Mathematics<br/>Combinatorial enumeration problems.<br/>MATHEMATICS