Goldberg, S <br/><br/>
Introduction to difference equations  with illustrative eg. from economics, psychology & sociology 
S. Goldberg 
 - New York  Dover Publications  1986 
 - xii  260 
<br/><br/><label>ISBN: </label>9780486650845 
<br/><br/><label>Dewey Class. No.: </label>11.02  / GOLD