Columbia subject headings:
Fishing boats--Germany--Ostfriesland--History--Sources.
Sailing ships--Germany--Ostfriesland--History--Sources.
Ship names--Germany--Ostfriesland.
Shipyards--Germany--Ostfriesland--History--Sources.
Sloops--Germany--Ostfriesland--History--Sources.
Harvard subject headings:
Fishing boats--Germany--Ostfriesland--History--Sources.
Sailing ships--Germany--Ostfriesland--History--Sources.
Ship names--Germany--Ostfriesland.
Shipyards--Germany--Ostfriesland--History--Sources.
Sloops--Germany--Ostfriesland--History--Sources.
Princeton subject headings:
Fishing boats--Germany--Ostfriesland--History--Sources.
Sailing ships--Germany--Ostfriesland--History--Sources.
Ship names--Germany--Ostfriesland.
Shipyards--Germany--Ostfriesland--History--Sources.
Sloops--Germany--Ostfriesland--History--Sources.