Columbia subject headings:
Germany (East). Ministerium für Staatssicherheit--History.
Subversive activities--Germany (West)--History.
Harvard subject headings:
Germany (East)--Politics and government.
Germany (East). Ministerium für Staatssicherheit--History.
Germany (East). Ministerium für Staatssicherheit.
Intelligence service--Germany (East)
Secret service--Germany (East)
Subversive activities--Germany (West)--History.
Princeton subject headings:
Germany (East)--Politics and government.
Germany (East). Ministerium für Staatssicherheit
Intelligence service--Germany (East)
Secret service--Germany (East)