Columbia subject headings:
Hagen (Arnsberg, Germany)--Economic conditions.
Hagen (Arnsberg, Germany)--History.
Hagen (Arnsberg, Germany)--Social life and customs.
Industries--Germany--Hagen (Arnsberg)
Harvard subject headings:
Hagen (Arnsberg, Germany)--Economic conditions.
Hagen (Arnsberg, Germany)--History.
Hagen (Arnsberg, Germany)--Social life and customs.
Industries--Germany--Hagen (Arnsberg)
Princeton subject headings: