Columbia subject headings:
Brittany (France)--History--To 1500.
Constance, Duchess of Brittany, 1161-1201.
Women heads of state--France--Brittany--Biography.
Harvard subject headings:
Brittany (France)--History--To 1500.
Constance, Duchess of Brittany, 1161-1201
Women heads of state--France--Brittany--Biography.
Princeton subject headings: