Columbia subject headings:
Dialectic.
Lenin, Vladimir Ilʹich, 1870-1924--Knowledge and learning.
Philosophy, Marxist.
Harvard subject headings:
Dialectic--History--20th century.
Lenin, Vladimir Ilʹich, 1870-1924--Contributions in concept of dialectic.
Lenin, Vladimir Ilʹich, 1870-1924--Philosophy.
Princeton subject headings: