Columbia subject headings:
Harvard subject headings:
Germany (East)--Politics and government.
Germany (East). Ministerium für Staatssicherheit.
Internal security--Germany (East)--History.
Princeton subject headings:
Germany (East)--Politics and government.
Germany (East). Ministerium für Staatssicherheit
Intelligence service--Germany (East)
Internal security--Germany (East)
Secret service--Germany (East)
Sozialistische Einheitspartei Deutschlands.