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Berger, Ernst Hugo (1836-1904)(11)
Zarncke, Friedrich (1825-1891)(4)
Ratzel, Friedrich (1844-1904)(2)
Sieglin, Wilhelm (1855-1935)(2)
Brugmann, Karl (1849-1919)(1)
Hettner, Alfred (1859-1941)(1)
Wagner, Hermann (1840-1929)(1)