Columbia subject headings:
Harvard subject headings:
Espionage, East German--Germany (West)--History--Sources.
Germany (East). Ministerium für Staatssicherheit--History--Sources.
Propaganda, East German--Germany (West)--History--Sources.
Princeton subject headings:
Germany (East). Ministerium für Staatssicherheit--History--Sources.
Propaganda, East German--Germany (West)--History--Sources.