Columbia subject headings:
Harvard subject headings:
Inscriptions, Cyrillic--Germany--Potsdam.
Internment camps--Soviet Union--History
KGB-Untersuchungsgefängnis (Potsdam, Germany)
Political prisoners' writings, German--Germany--Potsdam--History--20th century.
Political prisoners' writings, Russian--Russia (Federation)--Vorkuta (Komi)--History--20th century.
Political prisoners--Germany (East)--Biography--Sources.
Political prisoners--Germany--Potsdam--Biography--Sources.
Political prisoners--Soviet Union--History--20th century.
Prisons--Germany--Potsdam--History--Sources.
Secret service--Soviet Union--History--20th century.
Princeton subject headings:
Inscriptions, Cyrillic--Germany--Potsdam.
Internment camps--Soviet Union--History--20th century.
KGB-Untersuchungsgefängnis (Potsdam, Germany)
Political prisoners' writings, German--Germany--Potsdam--History--20th century.
Political prisoners' writings, Russian--Russia (Federation)--Vorkuta (Komi)--History--20th century.
Political prisoners--Germany (East)--Biography--Sources.
Political prisoners--Germany--Potsdam--Biography--Sources.
Political prisoners--Soviet Union--History--20th century.
Prisons--Germany--Potsdam--History--Sources.
Secret service--Soviet Union--History--20th century.