Columbia subject headings:
Culture--Early modern period.
Harvard subject headings:
Frisians--Germany--North Friesland (Region)--History.
Frisians--Germany--North Friesland (Region)--Social life and customs.
Marshes--North Frisian Islands (Denmark and Germany)
North Frisian Islands (Denmark and Germany)--Rural conditions.
Princeton subject headings:
Frisians--Germany--North Friesland (Region)--History.
Frisians--Germany--North Friesland (Region)--Social life and customs.
Marshes--North Frisian Islands (Denmark and Germany).
North Frisian Islands (Denmark and Germany)--Rural conditions.