Columbia subject headings:
Dissenters--Soviet Union.
Soviet Union--Politics and government--1936-1953.
Soviet Union--Politics and government--1953-1985.
Underground literature--Soviet Union.
Harvard subject headings:
Dissenters--Soviet Union
Soviet Union--Politics and government--1936-1953.
Soviet Union--Politics and government--1953-1985.
Underground literature--Soviet Union.
Princeton subject headings:
Dissenters--Soviet Union.
Soviet Union--Politics and government--1936-1953.
Soviet Union--Politics and government--1953- .
Underground literature--Soviet Union.