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Jahresbericht des Niedersächsischen Geologischen Vereins ...

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Item Link Original Source
Full view   3rd (1910) University of Minnesota
Full view   5th (1912) University of Minnesota
Full view   6th (1913) University of Minnesota
Full view   9th (1916) University of Minnesota
Full view   10th (1917) University of Minnesota
Full view   1913-1920 University of Michigan