Jolley, E.H. <br/><br/>
Introduction to telephony and telegraphy 

 - London  Wheeler Publishing  1979 
 - 413p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering<br/>Telegraph<br/>Telephone
<br/><br/><label>Dewey Class. No.: </label>621.385  / JOL