Columbia subject headings:
Alienation (Social psychology)
Communism and society.
Marx, Karl, 1818-1883.
Harvard subject headings:
Alienation (Philosophy)--History--19th century.
Alienation (Social psychology)
Liberty.
Marx, Karl, 1818-1883--Contributions in concept of alienation.
Princeton subject headings:
Alienation (Social psychology)
Marx, Karl, 1818-1883.