Columbia subject headings:
Communism--Europe, Eastern--Purges--Bibliography.
Communism--Party discipline and friction--Bibliography.
Communism--Purges--Bibliography.
Communism--Soviet Union--Purges--Bibliography.
Europe, Eastern--Trials, litigation, etc.--Bibliography.
Soviet Union--Trials, litigation, etc.--Bibliography.
Harvard subject headings:
Princeton subject headings:
Communism--Europe, Eastern.
Trials--Europe, Eastern--Bibliography.