Columbia subject headings:
Bulgakov, Mikhail, 1891-1940--Criticism and interpretation--Congresses.
Russian literature--20th century--History and criticism--Congresses.
Harvard subject headings:
Bulgakov, Mikhail, 1891-1940--Criticism and interpretation--Congresses.
Princeton subject headings:
Bulgakov, Mikhail, 1891-1940--Criticism and interpretation--Congresses.
Russian literature--20th century--History and criticism--Congresses.