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| Country/geo | German East Africa |
| Subject | Wireless telegraphy and telephony, radio |
| superordinated | Postal services, telegraphy and telephony |
| Signature | C110 : n34 Sm1 |
| URI | http://purl.org/pressemappe20/folder/sh/141471,145663 |
| ID | sh/141471,145663 |