Columbia subject headings:
Literature--History and criticism--Theory, etc.
Literature--Research.
Russian literature--19th century--History and criticism.
Russian literature--20th century--History and criticism.
Harvard subject headings:
Russian literature--19th century--History and criticism
Russian literature--20th century--History and criticism
Princeton subject headings:
Literature--History and criticism--Theory, etc.
Literature--Research.
Russian literature--19th century--History and criticism.
Russian literature--20th century--History and criticism.