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The National safety competition of 1930

The National safety competition of 1931

The National safety competition of 1932

The National safety competition of 1935

The national safety competition of 1936

Published Year

• 1930-1939 (5)

Subject

• Coal mine accidents (5) *
• Coal mines and mining--United States (5) *
• Mine safety (5) *

Author

• Adams, William W. (5)
• Lawrence, T. D. (2)
• Getzin, E. E. (1)
• White, D. R. (1)

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