Columbia subject headings:
Kaszuby (Poland)--History--Sources.
Polish periodicals--Poland--Gdańsk.
Pomerania.
Pomerelia (Poland)--History--Sources.
Harvard subject headings:
Kaszuby (Poland)--History--Sources.
Polish periodicals--Poland--Gdańsk.
Pomerania.
Pomerelia (Poland)--History--Sources.
Princeton subject headings: