Columbia subject headings:
Blok, Aleksandr Aleksandrovich, 1880-1921--Books and reading.
Blok, Aleksandr Aleksandrovich, 1880-1921--Library.
Harvard subject headings:
Blok, Aleksandr Aleksandrovich, 1880-1921--Books and reading.
Blok, Aleksandr Aleksandrovich, 1880-1921--Library.
Princeton subject headings:
Blok, Aleksandr Aleksandrovich, 1880-1921--Books and reading.
Blok, Aleksandr Aleksandrovich, 1880-1921--Library.