TY  - BOOK
AU  - Coatesworth, D
TI  - Telecommunication for technicians
U1  - 621.8 COA 
PY  - 1969///.
CY  - Harmondsworth : 
PB  - Penguin Books, 
KW  - Electrical engineering
KW  - Electronic engineerin
KW  - Electronic engineering
ER  -