Leach, D.P <br/><br/>
Digital Principles & Applications / 
Leach, D.P. 
 - 6th ed 
 - New Delhi:  Tata McGraw Hill,  2009. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>127267155x 
<br/><br/><label>Dewey Class. No.: </label>621.395 LEA