Columbia subject headings:
City planning--Spain--Barcelona--History--20th century.
City planning--Spain--Barcelona--History--21st century.
Harvard subject headings:
City planning--Spain--Barcelona--History--20th century.
City planning--Spain--Barcelona--History--21st century.
Princeton subject headings:
City planning--Spain--Barcelona--History--20th century.
City planning--Spain--Barcelona--History--21st century.