Columbia subject headings:
America--Antiquities--Congresses.
Paleo-Indians--Congresses.
Prehistoric peoples--America--Congresses.
Harvard subject headings:
Indians of North America--Antiquities--Congresses.
North America--Antiquities--Congresses.
Paleo-Indians--North America--Congresses.
Princeton subject headings:
Paleo-Indians--America.
Prehistoric peoples--America.