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Late prehistoric sites in the American Bottom with mounds, and the location of the ca. 1800 Mississippi River and pre-settlement wetlands (GLO data).
J.S. Oliver (Illinois State Museum-RCC, GIS Laboratory), & G.R. Milner (Penn State Univ.), . SEE ALSO Milner, G.R. 1998. The Cahokia Chiefdom: The Archaeology of a Mississippian Society. Smithsonian Institution Press, Washington.