Weff, John W. and Reis, Ronald A. <br/><br/>
Programmable logic controller 

 - 5th ed. 
 - New Jersey  Prentice Hall Inc  2003 
<br/><br/><label>ISBN: </label>978013416728 
<br/><br/><label>Dewey Class. No.: </label>629.89  / T03 WEB R