Columbia subject headings:
Geology, Stratigraphic--Quaternary--Congresses.
Geology--North America--Congresses.
North America--Antiquities--Congresses.
Paleo-Indians--North America--Congresses.
Harvard subject headings:
Geology, Stratigraphic--Quaternary--Congresses
Geology--North America--Congresses.
Northeastern States--Antiquities--Congresses.
Paleo-Indians--Canada, Eastern--Congresses.
Paleo-Indians--Northeastern States--Congresses.
Princeton subject headings:
Geology, Stratigraphic--Quaternary--Congresses.
Geology--North America--Congresses.
Northeastern States--Antiquities--Congresses.
Paleo-Indians--Canada, Eastern--Congresses.
Paleo-Indians--Northeastern States--Congresses.