Columbia subject headings:
Harvard subject headings:
Amrum Island (Germany)--Economic conditions.
Amrum Island (Germany)--History.
Amrum Island (Germany)--Social conditions.
Shipping--Germany--Amrum Island--History.
Princeton subject headings:
Amrum Island (Germany)--Economic conditions.
Amrum Island (Germany)--History.
Amrum Island (Germany)--Social conditions.
Shipping--Germany--Amrum Island--History.