Subjects: *UNEMPLOYMENT; MINES & mineral resourcesMICHIGAN; UPPER Peninsula (Mich.); UNITED StatesCOPPER Range Inc.
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Subjects: MINES & mineral resources; COPPER mining; SILVER miningMICHIGAN
Subjects: *MINES & mineral resources; *QUARRIES & quarryingMICHIGAN
Subjects: *MINES & mineral resources; *COPPER; *CLASTIC rocksUPPER Peninsula (Mich.); MICHIGAN
Subjects: MINERAL collectors; MINERALS; MINES & mineral resourcesMICHIGAN
Subjects: *MUSEUMS; *MINES & mineral resourcesHOUGHTON (Mich.); MICHIGANMICHIGAN Technological University...
Subjects: *Land use; *Mines & mineral resources; Legislative billsMichigan
Subjects: *ENVIRONMENTAL protection; NICKEL mining; MINES & mineral resourcesMICHIGANKENNECOTT Minerals Co.
Subjects: MINES & mineral resources; TOBACCO; CANCER treatmentMICHIGAN; UNITED States
Subjects: *MINES & mineral resources; *MINERALS; *BARITEMICHIGAN