Columbia subject headings:
Marx, Karl, 1818-1883--Influence.
Philosophy, Marxist.
Sartre, Jean-Paul, 1905-1980.
Harvard subject headings:
Communism and philosophy.
Marx, Karl, 1818-1883--Influence.
Philosophy, Marxist.
Sartre, Jean-Paul, 1905-1980--Political and social views.
Princeton subject headings: