Columbia subject headings:
Civilization, Modern--20th century.
Gandhi, Mahatma, 1869-1948.
Tolstoy, Leo, graf, 1828-1910.
Harvard subject headings:
Civilization, Modern--20th century
Gandhi, Mahatma, 1869-1948
Tolstoy, Leo, graf, 1828-1910
Princeton subject headings:
Civilization, Modern--20th century.
Gandhi, Mahatma, 1869-1948.
Tolstoy, Leo, graf, 1828-1910.