Columbia subject headings:
Brazil--Economic conditions--Congresses.
Brazil--History--Congresses.
Brazil--Social conditions--Congresses.
Historiography--Brazil--Congresses.
Historiography--Portugal--Congresses.
Portugal--Economic conditions--Congresses.
Portugal--History--Congresses.
Portugal--Social conditions--Congresses.
Harvard subject headings:
Brazil--Historiography--Congresses.
Brazil--Relations--Portugal--Congresses.
Portugal--Historiography--Congresses.
Portugal--Relations--Brazil--Congresses.
Princeton subject headings: