Atwood, W. W. (1929). The americas: The earth and its people. Ginn and Company.
Chicago-referens (17:e uppl.)Atwood, Wallace W. The Americas: The Earth and Its People. Ginn and Company, 1929.
MLA-referens (9:e uppl.)Atwood, Wallace W. The Americas: The Earth and Its People. Ginn and Company, 1929.
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