Columbia subject headings:
Architectural photography--Spain--History--20th century--Exhibitions.
Architecture and photography--Spain--History--20th century--Exhibitions.
Harvard subject headings:
Architectural photography--Spain--Exhibitions.
Architecture, Modern--Exhibitions.
Architecture--Spain--History--20th century--Pictorial works--Exhibitions.
Princeton subject headings:
Architectural photography--Spain--History--20th century--Exhibitions.
Architecture and photography--Spain--History--20th century--Exhibitions.