TY  - BOOK
AU  - Atkinson,J.
TI  - Telephony: a detailed exposition of the telephone exchange systems of the british post office 
AV  - TK6057 A75 1948
PY  - 1948///-
CY  - London
PB  - Sir Isaac Pitman
KW  - Teléfono
KW  - Gran Bretaña
KW  - Sistemas de telecomunicación
N1  - "A new edition of telephony hebert & procter"; Contenido: v.1. General principles and manual exchange systems -- v.2. Automatic exchange systems
ER  -