Columbia subject headings:
Lenin, Vladimir Ilʹich, 1870-1924--Congresses.
Marx, Karl, 1818-1883--Congresses.
Marxian economics--Congresses.
Ricardo, David, 1772-1823--Congresses.
Harvard subject headings:
Classical school of economics--Congresses.
Lenin, Vladimir Ilʹich, 1870-1924--Congresses.
Marx, Karl, 1818-1883--Congresses.
Marxian economics--Congresses.
Ricardo, David, 1772-1823--Congresses.
Princeton subject headings: