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Trommsdorff, Paul (1870-1940)
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Kalähne, Alfred (1874-1946)
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Spindler, Ernst (1854-1916). Editor Möhring, Bruno (1863-1929). Editor
Schaller, Waldemar Theodore (1882-1967) United States of America. Geological Survey.
Moffit, Fred Howard (1874-1958?) United States of America. Geological Survey.
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Campbell, Marius Robinson (1858-1940) United States of America. Geological Survey.
Clarke, Frank Wigglesworth (1847-1931) United States of America. Geological Survey.
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