Columbia subject headings:
Caucasus--In literature--Congresses.
Russian literature--History and criticism--Congresses.
Tolstoy, Leo, graf, 1828-1910--Congresses.
Harvard subject headings:
Princeton subject headings:
Caucasus--In literature.
Russian literature--19th century--History and criticism.
Tolstoy, Leo, graf, 1828-1910--Knowledge--Caucasus.