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Electrical blasting practice as some coal mines in state of Washington

Rock-dusting in coal mines of the State of Washington

Automatic derailing switch at Roslyn no. 3 mine, Northwestern Improvement Company, Roslyn, Wash.

Systematic timbering rules at the Washington coal mines

Explosions in Washington coal mines

Accident Experience and Cost of Accidents in Washington Coal Mines

Falls of roof and coal in Washington mines

Accident experience and cost of accidents at Washington metal mines and quarries

Accident prevention at the New Black Diamond Coal Mine, Washington

Safety practices in tunneling operations at the Hetch Hetchy Water-supply Project, City and County of San Francisco, Calif.

Explosives accidents in California metal mines

Unwatering flooded coal mines in Washington

Accident experience and cost in California metal mines

Some factors affecting an accident-prevention program in metal mining in California


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