Columbia subject headings:
Philadelphia (Pa.)--Pictorial works.
Philadelphia (Pa.)--Social life and customs--Pictorial works.
Harvard subject headings:
Philadelphia (Pa.)--Pictorial works.
Philadelphia (Pa.)--Social life and customs--Pictorial works.
Princeton subject headings:
Philadelphia (Pa.)--Description and travel.
Philadelphia (Pa.)--Pictorial works.
Philadelphia (Pa.)--Social life and customs--Pictorial works.