Gary, Dunning. <br/><br/>
Introduction to programmable logic controllers  
Dunning Gary. 
 - 2nd. ed. 
 - Australia  Thomson   2002. 
 - 516 p.  25 cm. 
<br/><br/> Economy edition printed in ASIA !! 
<br/><br/><label>ISBN: </label>813150302X (paperback) 9788131503027 (paperback) 
<br/><br/><label>Source: </label> 7 US$