Spiegel, Murray R. <br/><br/>
Theory and problems of calculus of finite  differences and difference equations 
<label>/ by </label> Spiegel, Murray R. 
 - New York  McGraw-Hill  1971 
 - [6],259p.  28 cm. 
<br/><br/>SR 
<br/><br/><label>Dewey Class. No.: </label>517.6  / S