View documents (IIIF viewer) (15 documents / 15 available on the web) View documents (DFG viewer)
| Country/geo | German imperial colonies |
| Subject | Wireless telegraphy and telephony, radio |
| superordinated | Postal services, telegraphy and telephony |
| Signature | A11 : n34 Sm1 |
| URI | http://purl.org/pressemappe20/folder/sh/140960,145663 |
| ID | sh/140960,145663 |