Columbia subject headings:
Architecture, Modern--20th century--Spain--Madrid (Region)--Designs and plans.
Architecture--Spain--Madrid (Region)--Designs and plans.
Architecture--Spain--Madrid (Region)--History--20th century--Designs and plans.
Harvard subject headings:
Architecture, Modern--20th century--Spain--Madrid--Catalogs.
Architecture--Spain--Madrid--Catalogs.
Princeton subject headings: