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born 14. March 1879 in Ulm; died 18. April 1955 in Princeton, NJBrief von Max Planck an Adolf Erman
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born 21. May 1873 in Schaffhausen; died 17. September 1953 in ZürichBrief von Emil Ermatinger an Adolf Erman
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Zürich, 22.12.1929Brief von Emil Ermatinger an Adolf Erman
Zürich, 14.01.1932