Search for: [References = %2210. Hartshorne R.%2C 1933. Geographic and political boundaries in Upper Silesia. Annals of the Association of American Geographers%2C vol. 23%2C no. 4%2C pp. 195%5C-228. https%5C:%5C%2F%5C%2Fdoi.org%5C%2F10.1080%5C%2F00045603309357073%22]

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