Columbia subject headings:
Blok, Aleksandr Aleksandrovich, 1880-1921--Last years.
Poets, Russian--20th century--Biography.
Harvard subject headings:
Blok, Aleksandr Aleksandrovich, 1880-1921--Last years.
Poets, Russian--20th century--Biography
Princeton subject headings:
Blok, Aleksandr Aleksandrovich, 1880-1921.
Poets, Russian--20th century--Biography.