Columbia subject headings:
Nigeria--Antiquities.
Nigeria--History--To 1851.
Harvard subject headings:
Iron age--Nigeria--Jema ̕a.
Iron age--Nigeria--Jemaʾa.
Jema ̕a (Nigeria)--Antiquities.
Jemaʾa (Nigeria)--Antiquities.
Mines and mineral resources, Prehistoric--Nigeria--Jema ̕a.
Mines and mineral resources, Prehistoric--Nigeria--Jemaʾa.
Nok Site (Nigeria)
Pottery figures, Prehistoric--Nigeria--Jema ̕a.
Pottery figures, Prehistoric--Nigeria--Jemaʾa.
Princeton subject headings: