Columbia subject headings:
Megalithic monuments--Senegambia.
Senegambia--Antiquities.
Harvard subject headings:
Gambia--Antiquities.
Megalithic monuments--Gambia.
Megalithic monuments--Senegal.
Megalithic monuments--Senegambia.
Senegal--Antiquities.
Senegambia--Antiquities.
Princeton subject headings: