Columbia subject headings:
Canals--Government policy--Ohio--History--19th century.
Canals--Ohio--History--19th century.
Ohio--Economic conditions.
Railroads and state--Ohio--History--19th century.
Railroads--Ohio--History--19th century.
Harvard subject headings:
Canals--Government policy--Ohio--History--19th century.
Canals--Ohio--History--19th century.
Ohio--Economic conditions.
Railroads and state--Ohio--History--19th century.
Railroads--Ohio--History--19th century.
Princeton subject headings:
Canals--Government policy--Ohio--History--19th century.
Canals--Ohio--History--19th century.
Ohio--Economic conditions.
Railroads and state--Ohio--History--19th century.
Railroads--Ohio--History--19th century.