TY  - BOOK
AU  - Povey,P.J.
TI  - The telephone and the exchange
SN  - 0273013556
PY  - 1979///
CY  - London
PB  - Pitman Pub.
KW  - Telephone
KW  - Telephone systems
N1  - A revised edition of the book published in Great Britain by The Post Office, 1974
ER  -