Columbia subject headings:
Harvard subject headings:
Poland--History, Military--15th century--Bibliography.
Poland--History--Casimir IV, 1447-1492--Bibliography.
Teutonic Knights--History--Bibliography.
Princeton subject headings:
Poland--History--Casimir IV, 1447-1492--Bibliography.
Poland--History--Casimir IV, 1447-1492.
Teutonic Knights--History.