Columbia subject headings:
Political prisoners--Germany--History--1933-1945--Biography.
Political prisoners--Germany--History--1933-1945--Exhibitions.
Sander, Erich, 1903-1944--Exhibitions.
Zuchthaus Siegberg--Exhibitions.
Harvard subject headings:
Nazis--Germany--Siegburg--Biography--Exhibitions.
Photographers--Germany--Biography--Exhibitions.
Photography, Artistic--Exhibitions
Prisoners of war--Germany--Siegburg--Biography--Exhibitions.
Sander, Erich, 1895---Exhibitions.
Siegburg (Germany)--History--20th century--Exhibitions.
World War, 1939-1945--Germany--Siegburg--Prisoners and prisons, German--Exhibitions.
World War, 1939-1945--Personal narratives, German--Exhibitions.
Zuchthaus Siegberg--Exhibitions.
Princeton subject headings: