Wright, G. F., & Haynes, H. W. (1892). Man and the glacial period. D. Appleton and Company.
Lua i Stíl Chicago (17ú heag.)Wright, G. Frederick, agus Henry W. Haynes. Man and the Glacial Period. New York: D. Appleton and Company, 1892.
Lua MLA (9ú heag.)Wright, G. Frederick, agus Henry W. Haynes. Man and the Glacial Period. D. Appleton and Company, 1892.
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