Leach, Donald P. <br/><br/>
Digital principles and applications / 
Donald P. Leach. 
 - 6th ed 
 - New Delhi:  Tata Mcgraw Hill,  2006. 
 - 683p;25cm 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0070601755 
<br/><br/><label>Dewey Class. No.: </label>621.395 LEA