Porter, Arthur, <br/><br/>
Introduction to servomechanisms. 

 - London,  Methuen;  [1950] 
 - vi, 154 p.  diagrs.  18 cm. 
<br/><br/><label>Subjects--Index Terms: </label>Servomechanisms 
<br/><br/><label>Dewey Class. No.: </label>621.8  / POR