JOlley E. H. <br/><br/>
Introduction to telephony and telegraphy / 
by JOlley E. H. 
 - X, 413 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronics and Communication<br/>Telephony and Telegraphy
<br/><br/><label>Dewey Class. No.: </label>621.38 JOL