Columbia subject headings:
Architects--Spain--History--20th century--Congresses.
Architecture--Spain--History--20th century--Congresses.
Modern movement (Architecture)--Spain--Congresses.
Harvard subject headings:
Architects--Spain--History--20th century--Congresses.
Architecture--Spain--History--20th century--Congresses.
Modern movement (Architecture)--Spain--Congresses.
Princeton subject headings:
Architects--Spain--History--20th century--Congresses.
Architecture--Spain--History--20th century--Congresses.
Modern movement (Architecture)--Spain--Congresses.