Columbia subject headings:
Harvard subject headings:
Espionage, East German--Germany--Oberfranken.
Germany (East). Ministerium für Staatssicherheit.
Intelligence service--Germany--Oberfranken.
Secret service--Germany--Oberfranken.
Spies--Germany--Oberfranken.
Princeton subject headings:
Espionage, East German--Germany--Oberfranken.
Germany (East). Ministerium für Staatssicherheit
Intelligence service--Germany--Oberfranken.
Secret service--Germany--Oberfranken.
Spies--Germany--Oberfranken.