Columbia subject headings:
Communism and society.
Communism.
Marx, Karl, 1818-1883.
Marxian economics.
Middle class.
Harvard subject headings:
Communism and society.
Communism.
Marx, Karl, 1818-1883
Marxian economics.
Middle class.
Princeton subject headings:
Communism and society.
Communism.
Marx, Karl, 1818-1883.
Marxian economics.
Middle class.