Unsichtbare Brücken
Unsichtbare Brücken
Unsichtbare Brücken en Cuevana 3. In the broadcasting center of a radio station, visitors are informed in a kind of educational course about how "electric waves" are generated and how they are converted into sounds that can then be heard on the radio.
- Género: Documental
- País: Germany
- Director: Hans Fritz Wilhelm
- Actores: Rolf Gert, Alfred Stratmann,
