Columbia subject headings:
Harvard subject headings:
American Bottom (Ill.)--Antiquities.
Carbon Dioxide Site (Ill.)
Excavations (Archaeology)--Illinois--American Bottom.
Indians of North America--Illinois--American Bottom--Antiquities.
Mississippian culture--Illinois--American Bottom--Antiquities.
Monroe County (Ill.)--Antiquities.
Woodland Indians--Illinois--American Bottom--Antiquities.
Princeton subject headings:
American Bottom (Ill.)--Antiquities.
Carbon Dioxide Site (Ill.)
Indians of North America--Illinois--American Bottom--Antiquities.