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Are you Walther Cloos, author of the books below?
The Living Origin of Rocks and Minerals by Walther Cloos The Living Earth by Walther Cloos Gemstones and Earth's History by Walther Cloos Kleine Edelsteinkunde. Im Hinblick auf die Geschichte der Erde. by Walther Cloos Kleine Edelsteinkunde Im Hinblick Auf Die Geschichte Der Erde by Walther Cloos


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