Columbia subject headings:
Architecture--Spain--Guidebooks.
Architecture--Spain--History--20th century--Guidebooks.
Harvard subject headings:
Architecture, Modern--20th century--Spain--Guidebooks.
Architecture--Spain--Guidebooks.
Architecture--Spain--History--20th century--Guidebooks.
Princeton subject headings:
Architecture, Modern--20th century--Spain--Guidebooks.
Architecture--Spain--Guidebooks.