Columbia subject headings:
Hudson River (N.Y. and N.J.)--Pictorial works.
Hudson River Valley (N.Y. and N.J.)--History.
Harvard subject headings:
Hudson River (N.Y. and N.J.)--Pictorial works.
Hudson River Valley (N.Y. and N.J.)--History.
Princeton subject headings:
Hudson River (N.Y. and N.J.)--Pictorial works.
Hudson River Valley (N.Y. and N.J.)--History.