Website of Jochen Karl Mehldau, in English:www.wittgensteiner.net/en/index.html
Wittgenstein Heimatverein, in English: wwww.wittgensteiner-heimatverein.de/home.html
Website of Paul Riedesel, in English: www.riedesel.org/wittgenstein.html
Website of Computergenealogy Wittgenstein, in German: www.genealogy.net/verein/Wittgenstein/sitemap/index.html
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