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