Atkinson, J. <br/><br/>
Telephony: a detailed exposition of the telephone exchange systems of the British post office 
/ J.Atkinson 
 - London  Sir Isaac Pitman & Sons  1958 
 - 873 p. 
<br/><br/> Includes appendix and index. 
<br/><br/><label>ISBN: </label>133131 
<br/><br/><label>Dewey Class. No.: </label>621.385  / ATK