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              Laurie, Bruce, Hershberg, Theodore, Alter, George, Immigrants and Industry: The Phüadelphia Experience, 1850-1880, in: Journal of Social History, 9, No. 2 (December 1975); this essay, presented to the Sixth International Congress on Economic History (Copenhagen, 1974), was reprinted in Richard Ehrlich (ed.), Immi¬ grants in Industrial America: 1850-1920, Charlottesvüle/Va. 1977*.
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              Laurie, B., Hershberg, T., Alter, G. (1975). Immigrants and Industry: The Phüadelphia Experience, 1850-1880. Journal of Social History, 9(2).
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