Yazar
bern international telegraph bureau
8 cilt bulundu.
International Telegraph Bureau, Bern. · Bureau international de' Union télégraphique
145 sayfa · 1913
Wireless Telegraph
International Telegraph Bureau, Bern. · [Imprimerie coopérative de Berne]
112 sayfa · 1915
Congresses / International Telegraph Union / Telegraph
International Telegraph Bureau, Bern. Telegraph Section · Yayınevi bilinmiyor
11 sayfa · 1926
Kategori yok
Switzerland) International Telegraph Bureau (Bern · The Bureau
327 sayfa · 1921
Telegraph stations / Directories
Switzerland) International Telegraph Bureau (Bern · International Bureau of the Telegraph Union
247 sayfa · 1929
Wireless Telegraph / Directories / Radio stations
Bern International Telegraph Bureau, International telegraph conference Paris 1925 · Bureau international de l'Union télégraphique
178 sayfa · 1926
Revisions (1875 Regulations) 1925 / Telegraph / Law and legislation / International telegraph convention,
Bern International Telegraph Bureau, European radio conference (1933 Lucerne) · Bureau international de l'Union télégraphique
40 sayfa · 1942
European radio convention (1933)