Stuart, J R. <br/><br/>
House telephones, bells and signalling systems : 

 - London :  George Newnes,  1942. 
 - viii, 178 p. :  ill. ;  19 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Signalling Devices<br/>Wired Intercoms<br/>Domestic Electronics
<br/><br/><label>Dewey Class. No.: </label>621.385  / STU