Columbia subject headings:
Harvard subject headings:
Eguérouène Wadi (Niger)--History.
Eguérouène Wadi (Niger)--Social life and customs.
Niger River--Description and travel.
Princeton subject headings:
Eguérouène Wadi (Niger)--History.
Eguérouène Wadi (Niger)--Social life and customs--Pictorial works.
Niger River Region--Description and travel.
Niger River Region--Pictorial works.