Columbia subject headings:
Harvard subject headings:
Den, Petr--Correspondence.
Den, Petr--Trials, litigation, etc.
Political prisoners--Germany--Correspondence.
Trials (Political crimes and offenses)--Germany--Dresden.
World War, 1939-1945--Underground movements--Czechoslovakia.
Princeton subject headings:
Den, Petr--Correspondence.
Den, Petr--Trials, litigation, etc.
Political prisoners--Germany--Correspondence.
Trials (Political crimes and offenses)--Germany--Dresden.
World War, 1939-1945--Underground movements--Czechoslovakia.