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Wyoming State Library (4)
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Book (2)
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Adult (4)
Author
Hjelmstad, Kenneth E (3)
Reimers, G. W. (George W.) (1)
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Fire alarms (2)
Clay (1)
ELF electromagnetic fields (1)
Electric detonators -- Safety measures (1)
Electromagnetic waves -- Transmission (1)
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Mine fires -- Prevention and control (1)
Ores -- Permeability (1)
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Kenneth E Hjelmstad
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Kenneth E Hjelmstad
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1)
Ultra low frequency electromagnetic fire alarm system for underground mines
Author
Hjelmstad, Kenneth E
Series
Report of investigations (United States. Bureau of Mines)
volume 9377
Book
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2)
Effect of clay stabilizers on permeability of clayey ore
Author
Hjelmstad, Kenneth E
Series
Report of investigations (United States. Bureau of Mines)
volume 8902
Book
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3)
Effect of ultralow frequency signaling on blasting array current
Author
Hjelmstad, Kenneth E
Series
Report of investigations (United States. Bureau of Mines)
volume 9479
Microform
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4)
Analysis of the oxidation of chalcopyrite, chalcocite, galena, pyrrhotite, marcasite, and arsenopyrite
Author
Reimers, G. W. (George W.)
Series
Report of investigations (United States. Bureau of Mines)
volume 9118
Microform
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