Columbia subject headings:
Arrest--Germany--Bad Freienwalde--History.
Dissenters--Germany--Bad Freienwalde--Biography.
Dissenters--Germany--Bad Freienwalde--History.
Secret service--Germany--Bad Freienwalde--History.
Secret service--Soviet Union--History.
Harvard subject headings:
Arrest--Germany--Bad Freienwalde--History.
Dissenters--Germany--Bad Freienwalde--Biography.
Dissenters--Germany--Bad Freienwalde--History.
Secret service--Germany--Bad Freienwalde--History.
Secret service--Soviet Union--History
Princeton subject headings:
Arrest--Germany--Bad Freienwalde--History.
Dissenters--Germany--Bad Freienwalde--Biography.
Dissenters--Germany--Bad Freienwalde--History.
Secret service--Germany--Bad Freienwalde--History.
Secret service--Soviet Union--History.