Columbia subject headings:
Europe--Colonies--History--18th century.
Imperialism--History.
Medicine--Europe--History--18th century.
Harvard subject headings:
Europe--Colonies--History--18th century.
Imperialism--History
Medicine--Europe--History--18th century.
Princeton subject headings:
Europe--Colonies--History--18th century.
Imperialism--History.
Medicine--Europe--History--18th century.