Columbia subject headings:
Poland--History--To 1795.
Poland--History--To 960.
Harvard subject headings:
Poland--History--960 (ca.)-1773.
Poland--History--To 1572
Poland--History--To 1572--Early works to 1800.
Poland--History--To 960
Poland--History--To 960--Early works to 1800.
Princeton subject headings:
Poland--History--Jagellons, 1386-1572.