Browsing by Author
Showing results 173 to 192 of 416
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Gangewere, Robert J. (Robert Jay), 1936-
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Garber & Woodward (Firm)
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Gardner, Henry A. (Henry Alfred), 1882-
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Gatewood, Richard, d. 1890.
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Gilbert, Bradford L. (Bradford Lee), 1853-1911.
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Greater Pittsburgh Chamber of Commerce
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Gulick, Charles Adams, 1896-
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Hall, J. Morton
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Halstead, Albert, 1867-1949
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Harbison-Walker Refractories Company.
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Haskins & Sells.
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H.C. Frick Coke Company.
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H. C. Torrance Collection.
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H.C. Torrance Collection.
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Heess, John Karl, 1873-
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Heywood, Ezra H. (Ezra Hervey), 1829-1893
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Hildenbrand, Wilhelm
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H. K. Porter Company.
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Homans, James E. (James Edward), b. 1865.
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Homestead Valve Manufacturing Company.
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Showing results 173 to 192 of 416