Columbia subject headings:
Harvard subject headings:
Iron founding
Iron industry and trade--Ohio--Portsmouth.
Iron industry and trade--Ohio--Scioto County.
Steel industry and trade--Ohio--Portsmouth.
Steel industry and trade--Ohio--Scioto County.
Princeton subject headings:
Iron founding.
Iron industry and trade--Portsmouth, O.
Iron industry and trade--Scioto co., O.
Steel industry and trade--Portsmouth, O.
Steel industry and trade--Scioto co., O.