Columbia subject headings:
Harvard subject headings:
Germany (East). Ministerium für Staatssicherheit--Officials and employees--Germany--Nordhausen (Thuringia)
Internal security--Germany--Nordhausen (Thuringia)--History--20th century.
Nordhausen (Thuringia, Germany)--History--20th century--Sources.
Secret service--Germany (East)--History--20th century.
Princeton subject headings:
Germany (East). Ministerium für Staatssicherheit--Officials and employees--Germany--Nordhausen (Thuringia).
Internal security--Germany--Nordhausen (Thuringia)--History--20th century.
Nordhausen (Thuringia, Germany)--History--20th century--Sources.
Secret service--Germany (East)--History--20th century.