TY  - BOOK
AU  - Atkinson, J.
TI  - Telephony: a detailed exposition of the telephone exchange systems of the british post office
SN  - 273 43180 3.- 273 43
PY  - 1968///
CY  - London
PB  - Sir ISAAC Pitman & Sons
UR  - http://krc.clri.res.in:80/cgi-bin/koha/opac-detail.pl?biblionumber=12561
ER  -