Columbia subject headings:
Pomerania (Poland and Germany)--History--19th century.
Prussia (Germany)--History--19th century.
Harvard subject headings:
Pomerania (Poland and Germany)--History--19th century--Congresses.
Pomerania (Sweden)--History--19th century--Congresses.
Prussia (Germany)--History--19th century--Congresses.
Princeton subject headings:
Pomerania (Poland and Germany)--History--19th century.
Pomerania (Sweden)--History--19th century.
Prussia (Germany)--History--19th century.