Columbia subject headings:
Harvard subject headings:
Architects--Portugal.
Architectural drawing--20th century--Portugal.
Architecture, Modern--20th century--Portugal.
Siza, Álvaro, 1933---Notebooks, sketchbooks, etc.--Notebooks, sketchbooks, etc.
Princeton subject headings:
Architecture, Modern--20th century.
Siza, Álvaro, 1933-