Columbia subject headings:
Artisans--Germany--Düsseldorf--History--19th century.
Labor unions--Germany--Düsseldorf--History--19th century.
Working class--Germany--Düsseldorf--History--19th century.
Harvard subject headings:
Artisans--Germany--Düsseldorf--History--19th century.
Düsseldorf (Germany)--History.
Düsseldorf (Germany)--Social conditions.
Labor unions--Germany--Düsseldorf--History--19th century.
Working class--Germany--Düsseldorf--History--19th century.
Princeton subject headings:
Artisans--Germany--Düsseldorf--History--19th century.
Artisans--Germany--Düsseldorf--Social Conditions.
Occupations--Germany--Düsseldorf--History--19th century.