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Fil:Leopoldina. Reihe 1, Heft 42, 1906 (IA leopoldina42kais).pdf

sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Leopoldina._Reihe_1,_Heft_42,_1906_(IA_leopoldina42kais).pdf...

Fil:Leopoldina 42 1906 p.68.png

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