Columbia subject headings:
Antiquities, Prehistoric--Congresses.
Dwellings, Prehistoric--Congresses.
Prehistoric peoples--Congresses.
Harvard subject headings:
Antiquities, Prehistoric--Congresses
Dwellings, Prehistoric--Congresses.
Prehistoric peoples--Congresses
Princeton subject headings:
Antiquities, Prehistoric--Congresses.
Dwellings, Prehistoric--Congresses.
Prehistoric peoples--Congresses.