Search U.S. government technical reports digitized or harvested by TRAIL.
Mining diatomaceous earth at Lompoc, California
Twenty live reasons for first-aid training in California
Explosives accidents in California metal mines
Accident experience and cost in California metal mines
Some factors affecting an accident-prevention program in metal mining in California
Mining and milling methods and costs at the glass-sand plant of P.J. Weisel, Inc., Corona, Calif.
Blast-hole diamond drilling in California mines
Minerals for chemical manufacturing :a survey of supply and demand in California and Nevada