Columbia subject headings:
Centralverein für das Wohl der Arbeitenden Klassen (Germany)--History.
Labor policy--Germany--History--19th century.
Working class--Germany--History--19th century.
Harvard subject headings:
Centralverein für das Wohl der Arbeitenden Klassen (Germany)--History.
Labor policy--Germany--History--19th century.
Working class--Germany--History--19th century
Princeton subject headings:
Centralverein für das Wohl der Arbeitenden Klassen (Germany)--History.
Labor policy--Germany--History--19th century.
Working class--Germany--History--19th century.