Columbia subject headings:
Harvard subject headings:
Agriculture, Prehistoric--Europe--Congresses.
Clearing of land--Europe--History--Congresses.
Europe--Antiquities--Congresses.
Nature--Effect of human beings on--Europe--Congresses.
Neolithic period--Europe--Congresses.
Princeton subject headings:
Clearing of land--Europe, Central--Congresses.
Neolithic period--Europe, Central--Congresses.
Paleoecology--Europe, Central--Congresses.
Prehistoric peoples--Europe, Central--Congresses.