English
Fontes, L. R. & Hagen, S, 2013. Fritz Müller - Índice para Internet Archive / An index to Internet Archive. [Atualizado em 2017] Bilingual. With some important external references. Updated 2017.
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Luiz Roberto Fontes · CC BY-NC-ND 3.0
Fritz Müller · Fritz Mueller · Príncipe dos Observadores · Fürst der Beobachter · Prince of Observers