Cockrell, W.D. <br/><br/>
Industrial Electronic Control 

 - Second 
 - McGRAW-HILL  Book Company  N.Y.  1950 
 - 385p.  fig. 
<br/><br/><label>Nat. Bib. No.: </label>2569 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering
<br/><br/><label>Universal Decimal Class. No.: </label>621.38  / COC