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Use of visual aids in the Morenci Branch safety program, Phelps Dodge Corp., Morenci, Ariz.

Published Year

• 1950-1959 (1)

Subject

• Copper mines and mining--Arizona (1)
• Employees--Training of--Audio-visual aids (1)

Author

• Look, Allen D. (1)
• Williams, M. L. (1) *

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