Columbia subject headings:
Poland--Foreign relations--Teutonic Knights.
Poland--Foreign relations--To 1572.
Prussia, East (Poland and Russia)--History.
Teutonic Knights--Foreign relations--Poland.
Harvard subject headings:
Poland--Foreign relations--Teutonic Knights.
Poland--Foreign relations--To 1572
Prussia, East (Poland and Russia)--History.
Teutonic Knights--Foreign relations--Poland.
Princeton subject headings:
Poland--Foreign relations--Teutonic Knights.
Poland--Foreign relations--To 1572.
Prussia, East (Poland and Russia)--History.
Teutonic Knights--Foreign relations--Poland.