Smith, Sydney F. <br/><br/>
Telephony and telegraphy :  an introduction to instruments and switching systems (electromechanical and reed-electronic) / 
by Sydney F. Smith. 
 - 3d ed. 
 - Oxford ;  New York :  Oxford University Press,  1978. 
 - xiv, 278 p. :  ill. ;  26 cm. 
<br/><br/> First ed. published in 1969 under title: Telephony & telegraphy A.  Includes index. 
<br/><br/>
<br/><br/><label>ISBN: </label>0198593589 :  0198593570  $16.50. 
<br/><br/><label>LCCN: </label>78318256  
<br/><br/><label>Nat. Bib. No.: </label>GB*** 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telephone.<br/>Telegraph.
<br/><br/><label>LC Class. No.: </label>TK6161  / .S6 1978 
<br/><br/><label>Dewey Class. No.: </label>621.3841/  / SMT