Columbia subject headings:
Anniversaries--Portugal--History.
Portugal--History--Revolution, 1640--Anniversaries, etc.
Portugal--History--Revolution, 1640--Centennial celebrations, etc.
Portugal--History--Revolution, 1640--Historiography.
Harvard subject headings:
Anniversaries--Portugal--History.
Portugal--History--Revolution, 1640--Anniversaries, etc.
Portugal--History--Revolution, 1640--Centennial celebrations, etc.
Portugal--History--Revolution, 1640--Historiography.
Princeton subject headings:
Portugal--Historiography.
Portugal--History--Revolution of 1640--Centennial celebrations, etc.
Portugal--History--Revolution of 1640.