Webb, John W. <br/><br/>
Programmable logic controllers :  principles and applications / 
John W. Webb, Ronald A. Reis 
 - 5th ed. 
 - Upper Saddle River, NJ :  Prentice Hall,  2003 
 - xv, 460 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9788120323087 9780130416728 (pbk.) 9780130416728 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Programmable controllers