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- Electronic mine-shaft signal system at Magma Copper Co., Superior, Ariz.
- Safety in blasting at Ajo, Ariz.
- Safety practices at United Verde Mine, Phelps Dodge Corp., Jerome, Ariz.
- Electrical blasting at Miami Copper Co., Miami, Ariz.
- Central mine rescue station, Globe-Miami district, mine rescue and first-aid association, Globe Ariz.