Columbia subject headings:
Communism--Soviet Union.
Communism.
Engels, Friedrich, 1820-1895.
Marx, Karl, 1818-1883.
Proletariat.
State, The.
Harvard subject headings:
Communism--Soviet Union
Communism.
Engels, Friedrich, 1820-1895
Marx, Karl, 1818-1883
Proletariat.
State, The.
Princeton subject headings:
Communism--Soviet Union.
Communism.
Engels, Friedrich, 1820-1895.
Marx, Karl, 1818-1883.
Proletariat.
State, The.