Servo and proportional systems catalog 

 - [S.l]  [s.n]  0 
 - 391 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Servomechanisms<br/> Computer control system-catalog
<br/><br/><label>Dewey Class. No.: </label>629.8323  / SER