Não informado. (1901). Bulletin of the American Geographical Society. American Geographical Society.
Chicago-referens (17:e uppl.)Não informado. Bulletin of the American Geographical Society. New York: American Geographical Society, 1901.
MLA-referens (8:e uppl.)Não informado. Bulletin of the American Geographical Society. American Geographical Society, 1901.
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