Columbia subject headings:
Harvard subject headings:
Communism--Soviet Union
Dissenters--Soviet Union
Russian literature--19th century--History and criticism
Russian literature--20th century--History and criticism
Soviet Union--History.
Princeton subject headings:
Communism--Soviet Union.
Dissenters--Soviet Union.
Russian literature--19th century--History and criticism.
Russian literature--20th century--History and criticism.
Soviet Union--History.