Columbia subject headings:
Harvard subject headings:
Germany (East)--Politics and government
Germany (East). Ministerium für Staatssicherheit
Intelligence service--Germany (East)--History.
Intelligence service--Germany--Thuringia--History--20th century.
Secret service--Germany (East)--History
Secret service--Germany--Thuringia--History--20th century.
Thuringia (Germany)--History--20th century.
Princeton subject headings:
Germany (East)--Politics and government.
Germany (East). Ministerium für Staatssicherheit
Intelligence service--Germany (East)--History.
Intelligence service--Germany--Thuringia--History--20th century.
Secret service--Germany (East)--History.
Secret service--Germany--Thuringia--History--20th century.
Thuringia (Germany)--History--20th century.