Columbia subject headings:
Harvard subject headings:
Political violence--20th century--Congresses.
Political violence--Soviet Union--Congresses.
Terror--Psychological aspects--Congresses.
Terrorism--20th century--Congresses.
Terrorism--Soviet Union--Congresses.
World War, 1939-1945--Atrocities--Congresses.
Princeton subject headings:
Political violence--20th century--Congresses.
Political violence--Soviet Union--Congresses.
Terror--Psychological aspects--Congresses.
Terrorism--20th century--Congresses.
Terrorism--Soviet Union--Congresses.
World War, 1939-1945--Atrocities--Congresses.