Columbia subject headings:
Blok, Aleksandr Aleksandrovich, 1880-1921.
Ivanov, V. I. (Vi︠a︡cheslav Ivanovich), 1866-1949.
Knowledge, Theory of.
Poetics.
Russian poetry--History and criticism.
Ti︠u︡tchev, F. I. (Fedor Ivanovich), 1803-1873.
Harvard subject headings:
Princeton subject headings:
Russian poetry--History and criticism.