TY  - BOOK
AU  - Smith J. R. G.
TI  - Elementary Telecommunication Practice . 
SN  - 0340046198
U1  - 621 . 38 
PY  - 1965///
CY  - Singapore
PB  - The English language Book Society and Hodder and Stoughton
KW  - Engineering & allied operations
ER  -