Columbia subject headings:
Canals--Economic aspects--New York (State)
Erie Canal (N.Y.)
Erie Canal (N.Y.)--History--Sources.
Inland water transportation--Economic aspects--New York (State)
Inland water transportation--New York (State)--Transit charges.
Harvard subject headings:
Canals--Economic aspects--New York (State)
Erie Canal (N.Y.)--History--Sources.
Inland water transportation--Economic aspects--New York (State)--Economic aspects.
Princeton subject headings: