Leach, Donald P. <br/><br/>
Digital Principles and Applications 
Donald P. Leach 
 - 6th ed. 
 - new delhi  Tata McGraw-Hill Publishing  2006 
 - xxii, 683p 
<br/><br/><label>ISBN: </label>0070601755 
<br/><br/><label>Dewey Class. No.: </label>621.38153 L465D