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Technological change and productivity in the bituminous coal industry 1920-60.

By: United States Department of Labor.
Material type: materialTypeLabelBookSeries: Bulletin.Publisher: Washington : USDL , 1961Description: ii, 137p. ; 25 cm.Subject(s): Coal resources | Coal mining | Productivity | Technological changeDDC classification: 333.82
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Last Updated on April 2, 2019
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