Columbia subject headings:
Harvard subject headings:
Helmrich, Donata, 1900-1986.
Helmrich, Eberhard, -1969.
Righteous Gentiles in the Holocaust
Princeton subject headings:
Righteous Gentiles in the Holocaust--Germany--Berlin--Biography.
World War, 1939-1945--Germany--Berlin--Biography.
World War, 1939-1945--Jews--Rescue--Germany--Berlin.