Columbia subject headings:
Tolstoy, Leo, graf, 1828-1910--Philosophy.
Tolstoy, Leo, graf, 1828-1910--Religion.
Harvard subject headings:
Tolstoy, Leo, graf, 1828-1910--Ethics.
Tolstoy, Leo, graf, 1828-1910--Philosophy.
Tolstoy, Leo, graf, 1828-1910--Religion.
Princeton subject headings:
Tolstoy, Leo, graf, 1828-1910--Philosophy.
Tolstoy, Leo, graf, 1828-1910--Religion.