Columbia subject headings:
Architecture, Domestic--Oregon--Portland--Pictorial works.
Armories--Oregon--Portland--Pictorial works.
Bank buildings--Oregon--Portland--Pictorial works.
Breweries--Oregon--Portland--Pictorial works.
Bridges--Oregon--Portland--Pictorial works.
Church buildings--Oregon--Portland--Pictorial works.
Factories--Oregon--Portland--Pictorial works.
Hospitals--Oregon--Portland--Pictorial works.
Hotels--Oregon--Portland--Pictorial works.
Landscapes--Oregon--Portland--Pictorial works.
Libraries--Oregon--Portland--Pictorial works.
Portland (Or.)--Pictorial works.
Public buildings--Oregon--Portland--Pictorial works.
Schools--Oregon--Portland--Pictorial works.
Streetscapes (Urban design)--Oregon--Portland--Pictorial works.
Theaters--Oregon--Portland--Pictorial works.
Waterfalls--Oregon--Portland--Pictorial works.
Harvard subject headings:
Portland (Or.)
Portland (Or.)--Description and travel.
Portland (Or.)--History.
Princeton subject headings: