Columbia subject headings:
Blind--Germany--History--20th century--Bibliography.
Germany--Social conditions--1933-1945--Bibliography.
Harvard subject headings:
Blind--Germany--History--20th century--Bibliography.
Germany--Social conditions--1933-1945--Bibliography.
Princeton subject headings:
Blind--Germany--History--20th century--Bibliography.
People with visual disabilities--Germany--History--20th century--Bibliography.