Rota, Gian-Carlo,  1932-1999 <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.