Introduction to programmable logic controllers. 

 - England  Audio Visual Source  19--. 
 - 4 video cassette(60 min.)  sd., col.  1/2 in. 
<br/><br/> Colour recording systems: VHS/NTSC 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Process control<br/>Programmable controllers
<br/><br/><label>Dewey Class. No.: </label>629.89 INT 19--