Hackworth, John R.    <br/><br/>
Programmable logic controllers:programming methods and applications /  
John R. Hackworth [and] Frederick D. Hackworth    
 - Upper Saddle River,New Jersey :  Pearson Prentice Hall,   2004.    
 - xiii; 303p. :  ill.;   23cm.    
<br/><br/>Includes bibliographical references,index and Cd rom    
<br/><br/><label>ISBN: </label>0130607185    
<br/><br/><label>Subjects--Topical Terms: </label><br/>Programmable controllers