Columbia subject headings:
Harvard subject headings:
Barcelona (Spain)--Economic policy.
City planning--Spain--Barcelona
Technological innovations--Spain--Barcelona.
Urban policy--Spain--Barcelona.
Princeton subject headings:
Barcelona (Spain)--Economic policy.
City planning--Spain--Barcelona--History--21st century.
Technological innovations--Spain--Barcelona--History--21st century.
Urban policy--Spain--Barcelona--History--21st century.