Columbia subject headings:
Harvard subject headings:
Leather industry and trade--Germany--Siegerland--History.
Siegerland (Germany)--Economic conditions.
Siegerland (Germany)--History.
Siegerland (Germany)--Social conditions.
Princeton subject headings:
Leather industry and trade--Germany--Siegerland--History.
Siegerland (Germany)--Economic conditions.
Tanning--Germany--Siegerland--History.