Columbia subject headings:
Harvard subject headings:
Communism--History
History--Philosophy
Socialism--History
Princeton subject headings:
Bakunin, Mikhail Aleksandrovich, 1814-1876.
Communism--History.
Engels, Friedrich, 1820-1895.
History--Philosophy.
Lassalle, Ferdinand, 1825-1864.
Lenin, Vladimir Ilʹich, 1870-1924.
Marx, Karl, 1818-1883.
Michelet, Jules, 1798-1874.
Socialism--History.
Trotsky, Leon, 1879-1940.