Columbia subject headings:
Kommunisticheskai͡a partii͡a Sovetskogo Soi͡uza--Purges.
Opposition (Political science)--Soviet Union--History.
Political purges--Soviet Union--History.
Soviet Union--Politics and government--1936-1953.
Stalin, Joseph, 1878-1953.
Harvard subject headings:
Princeton subject headings:
Communist trials--Soviet Union.
Kommunisticheskai︠a︡ partii︠a︡ Sovetskogo Soi︠u︡za--Purges.
Soviet Union--Politics and government--1936-1953.
Stalin, Joseph, 1878-1953.
Trotsky, Leon, 1879-1940.