Columbia subject headings:
Architecture--Spain--Barcelona--History--20th century.
Architecture--Spain--Barcelona--History--21st century.
Barcelona (Spain)--Buildings, structures, etc.
Harvard subject headings:
Princeton subject headings:
Architecture--Spain--Barcelona--History--20th century.
Architecture--Spain--Barcelona--History--21st century.
Barcelona (Spain)--Buildings, structures, etc.
Barcelona (Spain)--Guidebooks.
City planning--Spain--Barcelona--History--20th century.
City planning--Spain--Barcelona--History--21st century.
Guidebooks.