Columbia subject headings:
Excavations (Archaeology)--Nigeria--Niger River Delta.
Niger River Delta (Nigeria)--Antiquities.
Niger River Delta (Nigeria)--Civilization.
Prehistoric peoples--Nigeria--Niger River Delta.
Harvard subject headings:
Excavations (Archaeology)--Nigeria--Niger River Delta.
Niger River Delta (Nigeria)--Antiquities.
Niger River Delta (Nigeria)--Civilization.
Prehistoric peoples--Nigeria--Niger River Delta.
Princeton subject headings:
Excavations (Archaeology)--Nigeria--Niger River Delta.
Niger River Delta (Nigeria)--Antiquities.
Niger River Delta (Nigeria)--Civilization.
Prehistoric peoples--Nigeria--Niger River Delta.