Columbia subject headings:
Harvard subject headings:
Champlain Canal (N.Y.)--Altitudes--Charts, diagrams, etc.
Erie Canal (N.Y.)--Altitudes--Charts, diagrams, etc.
New York (State)--Administrative and political divisions--Maps.
New York (State)--Maps.
Princeton subject headings:
Champlain Canal (N.Y.)--Altitudes--Charts, diagrams, etc.
Erie Canal (N.Y.)--Altitudes--Charts, diagrams, etc.
Maps.
New York (State)--Administrative and political divisions--Maps.
New York (State)--Maps, Tourist.