Columbia subject headings:
Harvard subject headings:
Ideology--History
Lenin, Vladimir Ilʹich, 1870-1924
Mannheim, Karl, 1893-1947
Marx, Karl, 1818-1883
Princeton subject headings:
Ideology--History.
Lenin, Vladimir Ilʹich, 1870-1924.
Mannheim, Karl, 1893-1947.
Marx, Karl, 1818-1883.