Columbia subject headings:
Ballell, Frederic, 1864-1951.
Barcelona (Spain)--History--20th century--Pictorial works.
Rambla (Barcelona, Spain)--Pictorial works.
Streets--Spain--Barcelona--Pictorial works.
Harvard subject headings:
Ballell, Frederic, 1864-1951--Exhibitions.
Barcelona (Spain)--History--20th century--Exhibitions.
Rambla (Barcelona, Spain)--Pictorial works--Exhibitions.
Streets--Spain--Barcelona--Exhibitions.
Princeton subject headings: