Hugo Alexander Koch (Dutch Wikipedia)

Analysis of information sources in references of the Wikipedia article "Hugo Alexander Koch" in Dutch language version.

Last modified: 14:38:43, 3 January 2026 (UTC)

Ref.Un. Ref.Website

Global rank Dutch rank

32web.archive.org

1^st place

1^st place

web.archive.org (Global: 1^st place; Dutch: 1^st place)

De Leeuw, Karl (2003) The Dutch invention of the rotor machine, 1915-1923. cryptologia online errata
Bauer, Friedrich L: An error in the history of rotor encryption devices cryptologia, juli 1999.