Columbia subject headings:
Great Lakes (North America)--Commerce.
Industries--New England.
Inland navigation--United States.
Saint Lawrence River.
Transportation--New England.
Transportation--United States.
Harvard subject headings:
Great Lakes (North America)--Commerce.
Industries--New England
Inland navigation--United States.
Saint Lawrence River.
Transportation--New England.
Transportation--United States
Princeton subject headings:
Great Lakes (North America)--Commerce.
Industries--New England.
Inland navigation--United States.
Saint Lawrence River.
Transportation--New England.
Transportation--United States.