Denmark as a nodal point in the international telegraph network in the 1870s / Poul Thestrup and Hans Chr. Johansen
| Autor principal: | Thestrup, Poul |
|---|---|
| Otros autores: | Johansen, Hans Chr |
| Formato: | Libro |
| Nota: |
En "European networks..." / edited by Albert Carreras. Pag. 72-75 |
| Materias: |