Bolton, W. <br/><br/>
Programmable logic controllers / 
W. Bolton. 
 - 5th ed. 
 - Amsterdam ;  Boston :  Newnes,  c2009. 
 - xii, 400 p. :  ill. ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9781856177511 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Programmable controllers.<br/>Logic circuits.<br/>Programmable logic devices.