Columbia subject headings:
British--Portugal.
Great Britain--Foreign relations--Portugal.
Portugal--Foreign relations--Great Britain.
Portugal--History--Fernando I, 1367-1383.
Portugal--History--Interregnum, 1383-1385.
Portugal--History--John I, 1385-1433.
Harvard subject headings:
Great Britain--Foreign relations--Portugal.
Portugal--Foreign relations--Great Britain.
Portugal--History--Fernando I, 1367-1383.
Portugal--History--Interregnum, 1383-1385.
Portugal--History--John I, 1385-1433.
Princeton subject headings:
British--Portugal.
Great Britain--Foreign relations--Portugal.
Portugal--Foreign relations--Great Britain.
Portugal--History--Fernando I, 1367-1383.
Portugal--History--Interregnum, 1383-1385.
Portugal--History--John I, 1385-1433.