Crispin, Alan J.  1959- <br/><br/>
Programmable logic controllers and their engineering applications / 
Alan J. Crispin. 
 - London:   McGraw-Hill,   [1990].  
 - viii, 151 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0077072278 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Programmable controllers
<br/><br/><label>Dewey Class. No.: </label>629.895