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