Kelly, Walter G. <br/><br/>
Difference equations  Introduction with applications 

 - 2nd ed. 
 - New Delhi  Elsevier  2001 
 - ix  403p.  22 cm. PB 
<br/><br/><label>ISBN: </label>8131202333 
<br/><br/><label>Dewey Class. No.: </label>515.3  / KEL