Pennsylvania : memorial of manufacturers of hardware, smiths and iron-founders of the city of Philadelphia

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• Pennsylvania memorial of manufacturers of hardware, smiths and iron-founders of the city of Philadelphia
  Cyhoeddwyd: (1828)
• Trends in foundry production in the Philadelphia area,
  gan: Bezanson, Anne, et al.
  Cyhoeddwyd: (1929)
• Pennsylvania. Memorial of manufacturers of hardware, smiths and iron-founders, of the city of Philadelphia. : March 17, 1828. Referred to the committee of the whole House to which is committed the bill in alteration of the several acts imposing duties on imports
  Cyhoeddwyd: (1828)
• Pennsylvania iron manufacture in the eighteenth century
  gan: Bining, Arthur Cecil, 1893-1957, et al.
  Cyhoeddwyd: (1938)
• Documents relating to the manufacture of iron in Pennsylvania : published on behalf of the Convention of Iron Masters, which met in Philadelphia, on the twentieth of December, 1849
  Cyhoeddwyd: (1850)