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Industrial sociology --- Industriële sociologie --- Sociologie industrielle --- Defense contracts --- Military-industrial complex --- United States --- Armed Forces --- Procurement.

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Steam-engines --- Technology transfer. --- History

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"A Hammer in Their Hands (the title comes from the famous song about John Henry, "the steel-driving man" who beat the steam drill) collects newspaper and magazine articles, advertisements for runaway slaves, letters, folklore, excerpts from biography and fiction, legal patents, protest pamphlets, and other primary sources to document the technological achievements of African-Americans."--Jacket.

Technology --- African Americans --- History. --- Social aspects --- Black history --- SCIENCE, TECHNOLOGY & SOCIETY/General --- SOCIAL SCIENCES/Sociology --- African Americans history --- history

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History of technics in 18 century --- History of technics in 19 century --- History of industrial revolution --- Industrial revolution --- History of technics