Technology in America : history of individuals and ideas
edited by Carroll W. Pursell
MIT Press, 1981
Buku Teks SO
A history of environmentalism : local struggles, global histories
Bloomsbury Academic, 2014
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Herling, John
Labor unions in America
Robert B. Luce, 1964
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Labor in a changing America
edited by William Haber
Basic Books, 1966
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Kerr, Clark
Work in America
Van Nostrand Reinhold, 1979
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