Columbia subject headings:
Harvard subject headings:
Escapes--Germany
Prisoners of war--France.
Prisoners of war--Germany
World War, 1939-1945--Prisoners and prisons, German.
World War, 1939-1945--Underground movements--France.
Princeton subject headings:
Escapes--Germany.
Prisoners of war--France.
Prisoners of war--Germany.
World War, 1939-1945--Prisoners and prisons, German.
World War, 1939-1945--Underground movements--France.