Columbia subject headings:
Esenin, Sergeĭ Aleksandrovich, 1895-1925--Criticism and interpretation.
Esenin, Sergeĭ Aleksandrovich, 1895-1925--Knowledge and learning.
Folk songs in literature.
Folklore.
Harvard subject headings:
Esenin, Sergeĭ Aleksandrovich, 1895-1925--Criticism and interpretation.
Princeton subject headings: