Columbia subject headings:
Frisian movement.
North Friesland (Germany : Region)--History.
Harvard subject headings:
Frisian movement.
Nordfriesland (Germany)--History.
North Friesland (Germany : Region)--History.
Princeton subject headings:
Nordfriesland (Germany)--History--Sources.
Nordfriesland (Germany)--History.
Nordfriesland (Germany)--Intellectual life.