Columbia subject headings:
Harvard subject headings:
Africa, West--Boundaries--19th century.
Cartography--Niger--History.
Europe--Colonies--Africa.
France--Colonies--Africa--History.
France--Colonies--Africa.
Niger--Boundaries--History.
Niger--Colonization.
Niger--History--19th century.
Niger--History--20th century.
Princeton subject headings:
Africa--Boundaries--History.
Europe--Colonies--Africa.
France--Colonies--Africa.
Niger--Boundaries--History.