Columbia subject headings:
Architecture--Brazil--History--20th century--Congresses.
Architecture--Brazil--History--21st century--Congresses.
Architecture--Portugal--History--20th century--Congresses.
Architecture--Portugal--History--21st century--Congresses.
Harvard subject headings:
Architecture--Brazil--History--20th century--Congresses.
Architecture--Brazil--History--21st century--Congresses.
Architecture--Portugal--History--20th century--Congresses.
Architecture--Portugal--History--21st century--Congresses.
Princeton subject headings:
Architecture--Brazil--History--20th century--Congresses.
Architecture--Brazil--History--21st century--Congresses.
Architecture--Portugal--History--20th century--Congresses.
Architecture--Portugal--History--21st century--Congresses.