Columbia subject headings:
Harvard subject headings:
Children--Germany--History--19th century.
Children--Germany--History--20th century.
Socialization--History--19th century.
Socialization--History--20th century.
Working class--Germany--History--19th century
Working class--Germany--History--20th century
Princeton subject headings:
Germany--Social conditions--1871-1918.
Socialization.
Working class writings, German.
Working class--Education--Germany.