Foster, W. C. (2012). Climate and culture change in North America AD 900-1600. University of Texas Press.
Lua i Stíl Chicago (17ú heag.)Foster, William C. Climate and Culture Change in North America AD 900-1600. Austin: University of Texas Press, 2012.
Lua MLA (9ú heag.)Foster, William C. Climate and Culture Change in North America AD 900-1600. University of Texas Press, 2012.
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