Columbia subject headings:
Harvard subject headings:
Europe--Economic conditions--1789-1900.
Europe--Foreign relations.
Europe--Politics and government--1789-1900.
Europe--Social conditions--1789-1900.
Princeton subject headings:
Europe--Economic conditions--1789-1900.
Europe--Foreign relations.
Europe--Politics and government--1789-1900.
Europe--Social conditions--1789-1900.