Crispin, Alan J. <br/><br/>
Programmable logic controllers and their engineering applications / 
Alan J. Crispin 
 - 2nd ed 
 - London:   McGraw-Hill,   1997 
 - xii, 164 p.:   ill.;   25 cm 
<br/><br/> "Incorporating IEC 1131-3 standard"--Cover. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0077093178 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Programmable controllers