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The diffusion of technological change in the Pennsylvania pig iron industry, 1850-1870
Walsh, William David, (1975)
Establishment efficiency and profitability and the introduction of new technology in the mid-nineteenth century Pennsylvania pig iron industry
Walsh, William D., (1971)
Industrial evolution : organization, structure, and growth of the Pennsylvania iron industry, 1750 -1860
Paskoff, Paul F., (1983)