TY  - BOOK
AU  - AKKINSON, J
TI  - TELEPHONY A DETAILED EXPOSITION OF THE TELEPHONE EXCHANGE SYSTEMS OF THE BRITISH POST OFFICE
SN  - 0-273-43181-1
U1  - 621.385 ATK'T 
PY  - 1990///
CY  - LONDON
PB  - PITMAN
ER  -