Columbia subject headings:
Caucasus--Antiquities--Congresses.
France--Antiquities--Congresses.
Megalithic monuments--Caucasus--Congresses.
Megalithic monuments--France--Carnac--Congresses.
Megalithic monuments--France--Locmariaquer--Congresses.
Harvard subject headings:
Caucasus--Antiquities--Congresses.
France--Antiquities--Congresses.
Megalithic monuments--Caucasus--Congresses.
Megalithic monuments--France--Carnac--Congresses.
Megalithic monuments--France--Locmariaquer--Congresses.
Princeton subject headings: