TY  - BOOK
AU  - Atkinson,J.
TI  - Telephony: a detailed exposition of the telephone exchange systems of the British post office 
U1  - 621.385 
PY  - 1950/// [reprinted 1968]
CY  - London
PB  - Sir Isaac Pitman & Sons Ltd.
KW  - Telephone
KW  - Great Britain
N1  - Includes bibliographical references and index
ER  -