TY  - BOOK
AU  - ATKINSON, J
TI  - TELEPHONY A DETAILED EXPOSITION OF THE TELEPHONE EXCHANGE SYSTEM OF THE BRITISH POST OFFICE
SN  - 0-273-43180-0
U1  - 621.385 ATK'T 
PY  - 1972///
CY  - LONDON
PB  - PITMAN
ER  -