Columbia subject headings:
Europe--Economic conditions--1789-1900.
Europe--Politics and government--1848-1871--Sources.
Marx, Karl, 1818-1883--Philosophy.
Marx, Karl, 1818-1883.
Harvard subject headings:
Europe--Economic conditions--1789-1900.
Europe--Politics and government--1848-1871--Sources.
History, Modern--19th century
Marx, Karl, 1818-1883--Philosophy.
Marx, Karl, 1818-1883--Political and social views.
World politics--19th century
Princeton subject headings:
Europe--Economic conditions--1789-1900--Sources.
Europe--Politics and government--1848-1871--Sources.
History, Modern--19th century.
Marx, Karl, 1818-1883--Philosophy.
Marx, Karl, 1818-1883--Political and social views.