Columbia subject headings:
Cerdá, Ildefonso, 1815-1876.
City planning.
Urbanization--Spain--Barcelona.
Urbanization.
Harvard subject headings:
Barcelona (Spain)
Cerdá, Ildefonso, 1815-1876--Exhibitions.
City planning--Spain--Barcelona--Exhibitions.
Urbanization--Spain--Barcelona--History--Exhibitions.
Princeton subject headings: