Columbia subject headings:
Chekhov, Anton Pavlovich, 1860-1904.
Tolstoy, Leo, graf, 1828-1910.
Harvard subject headings:
Chekhov, Anton Pavlovich, 1860-1904
Tolstoy, Leo, graf, 1828-1910
Princeton subject headings:
Chekhov, Anton Pavlovich, 1860-1904.
Tolstoy, Leo, graf, 1828-1910.