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NACHRICHT
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Wireless telegraphy as a safeguard in railway service
The two-tone vibrating transmitter and inductive signaling
Wireless telegraphy for marine intercommunication
The wireless telegraph installation on the steamer "imperator"
The application of radiotelegraphy to the air ship
An experimental study of toll telephone traffic
Fitting applicants for railway wire service
Wireless telegraphy and safety in maritime navigation
Wireless communication with moving trains, D. L. and W. R. R.
Operating railway selectors without batteries