TY  - BOOK
AU  - PERKINS, W. T
TI  - ELEMENTARY TELECOMMUNICATION EXAMINATION GUIDE COVERING THE CITY AND GUILDS OF LONDON INSTITUTE EXAMINATION IN ELEMENTARY TELECOMMUNICATION PRACTICE AND TELECOMMUNICATION PRINCIPLES
U1  - 621.382 PER'E 
PY  - 1958///
CY  - LONDON
PB  - GEORGE
ER  -