"Radio message stations pp.", radio telegraphy: Vol. 2 Zur Zwischenablage hinzufügen BArch, RM 5/2110 Akt(e) 1908-1909 Teil vonFederal Archives (Archivtektonik) Contains: Report of the post office Duala and the gunboat "Panther" about telegraph attempts in Cameroon. Reprint, 1908 In: Signal and telegraph systems >> "Radio stations pp.", radio telegraphy.