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Ancient Ohio Trail: Fort Ancient
Although this is a travel site, the information and detail it contains about Fort Ancient is very scholarly. Included are short videos about the area, and several maps.
Archaeological Institute of America
Archaeology Magazine Archive: Who Were the Hopewell?
Read this informative article from the Archaelogy Magazine discussing the Hopewell culture, its agriculture and village life, and primarilty the ceremonial earthworks for which the culture is so famous.