TY  - BOOK
AU  - Atkinson, J.
TI  - Telephony a Detailed Exposition of the Telephone Exchange Systems of the British Post Office 2
U1  - 621.385 
PY  - 1950///
CY  - London : 
PB  - Pitman Publishing, 
KW  - Telephone
N1  - NN; v. 2. Automatic Exchange Systems
ER  -