Columbia subject headings:
Harvard subject headings:
Portugal--History--Afonso VI, 1656-1683.
Portugal--History--John V, 1706-1750.
Portugal--History--Pedro II, 1683-1706.
Princeton subject headings:
Portugal--History--Afonso VI, 1656-1683.
Portugal--History--John V, 1706-1750.
Portugal--History--Pedro II, 1683-1706.