Rota, Gian-Carlo,  1932 <br/><br/>
Finite operator calculus / 
Gian-Carlo Rota ; with the collaboration of P. Doubilet ... [et al.] 
 - New York :  Academic Press,  1975 
 - x, 159 p. ;  24 cm. 
<br/><br/>Includes bibliographies 
<br/><br/><label>ISBN: </label>0125966504 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial enumeration problems<br/>Linear operators<br/>Generating functions<br/>Commutative rings<br/>Valuation theory