Columbia subject headings:
Great Britain--History--Henry VII, 1485-1509.
Great Britain--History--To 1485.
Richard III, King of England, 1452-1485.
Harvard subject headings:
Great Britain--History--Henry VII, 1485-1509.
Great Britain--History--To 1485.
Richard III, King of England, 1452-1485.
Princeton subject headings: