Columbia subject headings:
Harvard subject headings:
Deutscher Metallarbeiter-Verband--History.
Industries--Germany--Solingen--History.
Metal-workers--Germany--Solingen--History.
Metal-workers--Labor unions--Germany--Solingen--History.
Princeton subject headings:
Artisans--Germany (West)--Solingen--History.
Cutlery trade--Germany (West)--Solingen--History.
Industrial relations--Germany (West)--Solingen--History.