Introduction to telephony and telegraph. 
Jolley, E.H 
 - Great britain,  Pitman.  1971. 
 - 413p. 
<br/><br/><label>ISBN: </label>0-273-31722-9 
<br/><br/><label>Subjects--Topical Terms: </label>--School of Engineering and Technology
<br/><br/><label>LC Class. No.: </label>TK 6161   / .J56 1971