Friedrich Ratzel
![Friedrich Ratzel](https://upload.wikimedia.org/wikipedia/commons/0/07/Bundesarchiv_Bild_183-R35179%2C_Prof._Friedrich_Ratzel.jpg)
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Published: 1891
Superior document: Anthropogeographie 2
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Published: 1895
Superior document: Völkerkunde Zweiter
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Published: 1894
Superior document: Völkerkunde Erster Band
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Published: 1888
Superior document: Völkerkunde 3
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Published: 1890
Superior document: Völkerkunde 3
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Published: 1885
Superior document: Völkerkunde 1
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Published: 1890
Superior document: Völkerkunde 2
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Published: 1923
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Published: 1893
Superior document: Die Vereinigten Staaten von Nord-Amerika 2