Browse TRAIL Inventories

Nonmetallic mineral industries in 1939

Limestone and dolomite in the chemical and processing industries

A quarter century of mechanized mining:notes on permissibility

Stemming in metal mines :progress report 7

Prospect trenching with caterpillar-mounted angledozers

Diamond-drilling blast holes, eastern Magnetite Mine A

Blue Bell fluorite deposits, Beaver County, Utah

Good Fortune Iron Mine, Platte County, Wyo.

The determination of low concentrations of hydrogen sulfide in gas by the methylene blue method


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