Denmark as a nodal point in the international telegraph network in the 1870s / Poul Thestrup and Hans Chr. Johansen
| Main Author: | Thestrup, Poul |
|---|---|
| Other Authors: | Johansen, Hans Chr |
| Format: | Book |
| Nota: |
En "European networks..." / edited by Albert Carreras. Pag. 72-75 |
| Subjects: |