Columbia subject headings:
Harvard subject headings:
Excavations (Archaeology)--Ohio River Valley.
Hopewell culture--Ohio River Valley.
Indians of North America--Ohio River Valley--Antiquities.
Indians of North America--Ohio River Valley--Social life and customs.
Mound-builders--Ohio River Valley.
Ohio River Valley--Antiquities
Princeton subject headings:
Hopewell culture.
Indians of North America--Ohio.