Columbia subject headings:
Europe--Colonies.
Europe--Colonization--History.
Europe--Foreign relations--1871-1918.
Europe--Foreign relations--1918-1945.
Harvard subject headings:
Colonies
Colonization--History
Europe--Colonies.
Europe--Colonization--History.
Europe--Foreign relations--1871-1918
Europe--Foreign relations--1918-1945
Imperialism
Princeton subject headings:
Europe--Colonies.
Europe--Colonization--History.
Europe--Foreign relations--1871-1918.
Europe--Foreign relations--1918-1945.