Walker, Ronald Claude <br/><br/>
Relays for electronic and industrial control / 
Ronald Claude Walker 
 - London :  Chapman & Hall,  1953 
 - xi, 303 p. :  ill.., diagrs ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic mail systems--Evaluation<br/>Wireless communication systems
<br/><br/><label>Dewey Class. No.: </label>131