TY  - BOOK
AU  - Perkins, W.  T 
TI  - Elementary telecommunications examination guide: covering the city and guilds of london institute examation in elementary telecommunication practice and telecommunication (PRINCIPLE) 1
U1  - 621.384 
PY  - 1958///
CY  - London
PB  - George Newnes Ltd.
KW  - Telecommunication
ER  -