Columbia subject headings:
Harvard subject headings:
Prussia (Germany)--Church history.
Prussia (Germany)--History.
Reformation--Germany--Prussia.
Princeton subject headings:
Elbląg (Poland)--Politics and government.
Elbląg (Poland)--Religious llife and customs.
Gdańsk (Poland)--Politics and government.
Gdańsk (Poland)--Religious life and customs.
Toruń (Poland)--Politics and government.
Toruń (Poland)--Religious life and customs.