Columbia subject headings:
Atheism.
Idealism.
Lenin, Vladimir Ilʹich, 1870-1924.
Religion.
Harvard subject headings:
Communism and religion.
Idealism--History.
Lenin, Vladimir Ilʹich, 1870-1924--Religion.
Lenin, Vladimir Ilʹich, 1870-1924--Views on idealism.
Religion--History
Princeton subject headings:
Atheism.
Idealism.
Lenin, Vladimir Ilʹich, 1870-1924.
Religion.