Columbia subject headings:
Harvard subject headings:
Germany--History--1933-1945.
Parents--Germany--Correspondence.
Photographers--Germany--Correspondence.
Political prisoners--Germany--Siegburg--Biography.
Sander, Anna--Correspondence.
Sander, August--Correspondence.
Sander, Erich, 1903-1944--Correspondence.
Zuchthaus Siegburg--History.
Princeton subject headings:
Anti-Nazi movement--Germany.
Germany--Politics and government--1933-1945.
Photographers--Germany--Correspondence.
Political prisoners--Germany--Correspondence.
Sander, Erich, 1903-1944--Correspondence.
Sander, Erich, 1903-1944--Imprisonment.
Socialists--Germany--Correspondence.