TY  - BOOK
AU  - Greenwood,W.
TI  - A text-book of wireless telegraphy and telephony
U1  - 621.3842 
PY  - 1925///
CY  - London
PB  - University Control Press
KW  - Telegraph, wireless
KW  - Telegraphone
KW  - Telegraph
KW  - Telecommunications
N1  - Includes index
ER  -