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Search U.S. government technical reports digitized or harvested by TRAIL.
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9 results returnedCoal-mine fatalities in the United States, 1922
The National Safety Competition to assist in the reduction of mine and quarry accidents
The National safety competition of 1930
The National safety competition of 1931
The National safety competition of 1932
The National safety competition of 1935
The national safety competition of 1936
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