View documents (IIIF viewer) (1 documents / 1 available on the web) View documents (DFG viewer)
Country/geo | Spanish Guinea |
Subject | Wireless telegraphy and telephony, radio |
superordinated | Postal services, telegraphy and telephony |
URI | https://pm20.zbw.eu/folder/sh/141412,145663 |
ID | sh/141412,145663 |