TY  - BOOK
AU  - Herbert,Thomas Ernest
AU  - Atkinson,James
TI  - Telephony: a detailed exposition of the telephone exchange systems of the British post office 
SN  -  (hbk.)
AV  - TK6161 .H572
U1  - 621.385 
PY  - 1972///
CY  - London
PB  - I. Pitman
KW  - Telephone
KW  - Telecommunication
N1  - Includes index
ER  -