Columbia subject headings:
Beheading--Nigeria--Niger River Delta.
Igbo (African people)--Civilization.
Military trophies--Nigeria--Niger River Delta.
Niger River Delta (Nigeria)--Civilization.
Niger River Delta (Nigeria)--History.
Harvard subject headings:
Beheading--Nigeria--Niger River Delta.
Igbo (African people)--Civilization.
Military trophies--Nigeria--Niger River Delta.
Niger River Delta (Nigeria)--Civilization.
Niger River Delta (Nigeria)--History.
Princeton subject headings:
Beheading--Nigeria--Niger River Delta.
Igbo (African people)--Civilization.
Military trophies--Nigeria--Niger River Delta.
Niger River Delta (Nigeria)--Civilization.
Niger River Delta (Nigeria)--History.