TY  - BOOK
AU  - Atkinson,J.
AU  - Herbert,T.E.
AU  - Procter,W.S.
TI  - Telephony: a detailed exposition of the telephone exchange system of the British Post Office 
SN  - 0273431811
U1  - 621.385 23
PY  - 1950/// [Reprinted 1972]
CY  - London
PB  - Pitman
KW  - Telephone stations
N1  - Includes bibliographies and index; V-1.-- General principles and manual exchange systems; V-2.-- Automatic exchange systems
ER  -