Columbia subject headings:
Anti-Nazi movement--Biography.
Klotz, Helmuth, 1894-1943.
Harvard subject headings:
Anti-Nazi movement--Germany--Biography
Klotz, Helmuth, 1894-1943.
National socialism.
Nazis--Germany--Biography
Socialists--Germany--Biography
Sozialdemokratische Partei Deutschlands
Princeton subject headings:
Anti-Nazi movement--Germany--Biography.
Klotz, Helmuth, 1894-1943.
National socialism.
Nazis--Germany--Biography.
Socialists--Germany--Biography.
Sozialdemokratische Partei Deutschlands.