Relays :  data summary. 

 - Harlow, Essex :  Standard Telephones and Cables Ltd,  1967. 
 - 63 p. :  ill. ;  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric relays.
<br/><br/><label>Dewey Class. No.: </label>P 621.383 S93