Columbia subject headings:
Harvard subject headings:
Brazil--Politics and government--Congresses.
Brazil--Relations--Portugal--Congresses.
Brazil--Religion--History--Congresses.
Brazil--Social conditions--Congresses.
Portugal--Politics and government--Congresses.
Portugal--Relations--Brazil--Congresses.
Portugal--Religion--History--Congresses.
Portugal--Social conditions--Congresses.
Princeton subject headings:
Brazil--Social conditions--21st century--Congresses.
Portugal--Social conditions--21st century--Congresses.