Columbia subject headings:
Mennonites--Germany--Krefeld--Economic conditions.
Silk industry--Germany--Krefeld--History.
Harvard subject headings:
Mennonites--Germany--Krefeld--Economic conditions.
Silk industry--Germany--Krefeld--History.
Princeton subject headings:
Mennonites--Germany--Krefeld--Economic conditions.
Silk industry--Germany--Krefeld--History.