Columbia subject headings:
Harvard subject headings:
Christlich-Demokratische Union Deutschlands (Germany : East)
Espionage, East German--Germany (West)
Germany (East)--Politics and government.
Germany (East). Nationale Volksarmee
Hamburg (Germany). Bürgerschaft.
Löffler, Gerd, 1939-
Löffler, Gerd.
Secret service--Germany (East)
Secret service--Germany (East)--History
Spies--Germany (East)--Biography.
Princeton subject headings:
Christlich-Demokratische Union Deutschlands (Germany : East)
Espionage, East German--Germany (West).
Germany (East)--Politics and government.
Germany (East). Nationale Volksarmee
Hamburg (Germany). Bürgerschaft
Löffler, Gerd, 1939-
Secret service--Germany (East)--History.
Spies--Germany (East)--Biography.