Columbia subject headings:
Africa, West--Description and travel--Exhibitions.
Binger, Louis Gustave, 1856-1936--Exhibitions.
Niger River--Description and travel--Exhibitions.
Sudan (Region)--Description and travel--Exhibitions.
Harvard subject headings:
Africa, West--Description and travel--Exhibitions.
Binger, Louis Gustave, 1856-1936--Exhibitions.
Niger River--Description and travel--Exhibitions.
Sudan (Region)--Description and travel--Exhibitions.
Princeton subject headings: