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The National safety competition of 1935

The national safety competition of 1936

National safety competition of 1937

National safety competition of 1938

Published Year

• 1930-1939 (4)

Subject

• Coal mine accidents (4)
• Coal mines and mining--United States (4) *
• Mine safety (2)

Author

• Adams, William W. (4)
• Lawrence, T. D. (4) *
• Getzin, E. E. (2)
• White, D. R. (1)

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