Columbia subject headings:
Architecture--Portugal--Porto--History--20th century--Catalogs.
Porto (Portugal)--Buildings, structures, etc.--Catalogs.
Harvard subject headings:
Architects--Portugal--Porto.
Architecture, Modern--20th century--Portugal--Porto.
Porto (Portugal : District)
Porto (Portugal)--Buildings, structures, etc.
Siza, Álvaro, 1933-
Princeton subject headings: