Columbia subject headings:
Art, American--Pennsylvania--Pittsburgh--19th century--Exhibitions.
Art, American--Pennsylvania--Pittsburgh--Exhibitions.
Harvard subject headings:
Art, American--Pennsylvania--Pittsburgh--Exhibitions.
Art, Modern--19th century--Pennsylvania--Pittsburgh--Exhibitions.
Princeton subject headings:
Art, American--Pennsylvania--Pittsburgh--Exhibitions.
Art, Modern--19th century--Pennsylvania--Pittsburgh--Exhibitions.