Columbia subject headings:
Barcelona (Spain)--History--20th century--Pictorial works.
City planning--Spain--Barcelona--History--20th century--Pictorial works.
Urbanization--Spain--Barcelona--History--20th century--Pictorial works.
Harvard subject headings:
Barcelona (Spain)--History--20th century--Pictorial works.
City planning--Spain--Barcelona--History--20th century--Pictorial works.
Urbanization--Spain--Barcelona--History--20th century--Pictorial works.
Princeton subject headings:
Barcelona (Spain)--History--20th century--Pictorial works.
City planning--Spain--Barcelona--History--20th century--Pictorial works.
Urbanization--Spain--Barcelona--History--20th century--Pictorial works.