NIEBERGALL, Friedrich

https://web.archive.org/web/20070609101520/http://www.bautz.de/bbkl/n/niebergall_f.shtml

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https://web.archive.org/web/20130425110356/http://www.philosophie-woerterbuch.de/online-woerterbuch/?tx_gbwbphilosophie_main%5Bentry%5D=48&tx_gbwbphilosophie_main%5Baction%5D=show&tx_gbwbphilosophie_main%5Bcontroller%5D=Lexicon&no_cache=1

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