Columbia subject headings:
Harvard subject headings:
20e Arrondissement (Paris, France)--History--20th century.
20e Arrondissement (Paris, France)--Pictorial works.
20e Arrondissement (Paris, France)--Social life and customs.
Paris (France)--History--20th century.
Paris (France)--Pictorial works.
Paris (France)--Social life and customs.
Princeton subject headings:
20e Arrondissement (Paris, France)--Pictorial works.
Paris (France)--Social life and customs.
Postcards--France--Paris.