Graebner, W. (1976). Coal-mining safety in the progressive period: The political economy of reform. The University Press of Kentucky.
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Dyfyniad Arddull Chicago
Graebner, William. Coal-mining Safety in the Progressive Period: The Political Economy of Reform. Lexington, Kentucky: The University Press of Kentucky, 1976.
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Dyfyniad MLA
Graebner, William. Coal-mining Safety in the Progressive Period: The Political Economy of Reform. The University Press of Kentucky, 1976.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.