Columbia subject headings:
Harvard subject headings:
Berlin Wall, Berlin, Germany, 1961-1989.
Border patrols--Germany (East)
Retroactive laws--Germany.
Trials (Murder)--Germany.
Trials (Political crimes and offenses)--Germany
Princeton subject headings:
Berlin Wall, Berlin, Germany, 1961-1989.
Border patrols--Germany (East).
Retroactive laws--Germany.
Trials (Murder)--Germany.
Trials (Political crimes and offenses)--Germany.