Digital electronics 
Green, D.C. 
 - Fifth edition. 
 -  Addison Wesley Longman Limited.  1999 
 - ix,398 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>0-582-31736-3 
<br/><br/><label>Dewey Class. No.: </label>621.3815 G82d 1999