Columbia subject headings:
Harvard subject headings:
Borno State (Nigeria)--Antiquities.
Borno State (Nigeria)--History.
Chad (Lake, Region)--History.
Nigeria--Antiquities.
Prehistoric peoples--Chad, Lake, Region.
Prehistoric peoples--Nigeria--Borno State.
Princeton subject headings:
Borno State (Nigeria)--Antiquities.
Prehistoric peoples--Chad, Lake, region.
Prehistoric peoples--Nigeria--Borno.