Columbia subject headings:
Blok, Aleksandr Aleksandrovich, 1880-1921--Criticism and interpretation.
Russian poetry--20th century--History and criticism.
Harvard subject headings:
Blok, Aleksandr Aleksandrovich, 1880-1921--Criticism and interpretation.
Russian poetry--19th century--History and criticism
Princeton subject headings:
Blok, Aleksandr Aleksandrovich, 1880-1921--Criticism and interpretation.