Columbia subject headings:
Allegiance--Soviet Union--History.
Exile (Punishment)--Soviet Union--History.
Exile (Punishment)--Ukraine--History.
Forced migration--Soviet Union--History.
Political persecution--Soviet Union--History.
Political persecution--Ukraine--History.
State-sponsored terrorism--Soviet Union--History.
Harvard subject headings:
Exile (Punishment)--Soviet Union--History.
Penal colonies--Soviet Union--History.
Political persecution--Soviet Union--History
Soviet Union--Politics and government
Princeton subject headings: