Rota G C <br/><br/>
Finite operator calculus 

 - New York       Academic Press         1975 
 - x,159p.  cm. 
<br/><br/><label>Standard No.: </label>24663 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B48, L5