Jolley, Ernest Harris <br/><br/>
Introduction to telephony and telegraphy / 
E. H. Jolley 
 - New Delhi :  Pitman Publications,  1968 
 - x, 413 p. :  ill. ;  26 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label> Rs. 110.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telephone<br/>Telegraph
<br/><br/><label>Dewey Class. No.: </label>621.385