Columbia subject headings:
Harvard subject headings:
Bulgakov, Mikhail, 1891-1940--Criticism and interpretation.
Čapek, Karel, 1890-1938--Criticism and interpretation.
Dystopias in literature.
Literature, Modern--History and criticism
Princeton subject headings:
Bulgakov, Mikhail, 1891-1940--Criticism and interpretation.
Čapek, Karel, 1890-1938--Criticism and interpretation.