Columbia subject headings:
Harvard subject headings:
Great Britain--History--Lancaster and York, 1399-1485
Great Britain--History--Tudors, 1485-1603.
Princeton subject headings:
Great Britain--History--Henry VI, 1422-1461.
Great Britain--History--Tudors, 1485-1603.
Great Britain--History--Wars of the Roses, 1455-1485.