Columbia subject headings:
Russian language--Usage.
Harvard subject headings:
Blok, Aleksandr Aleksandrovich, 1880-1921--Literary style.
Russian language--Style.
Russian poetry--20th century--History and criticism
Princeton subject headings:
Blok, Aleksandr Aleksandrovich, 1880-1921--Style.
Russian language--Style.
Russian poetry--20th century--History and criticism.