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

 - New Delhi :   Wheeler Publication,   1997. 
<br/><br/><label>ISBN: </label>8185614369 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical Sciences
<br/><br/><label>Dewey Class. No.: </label>621.385  / JOL