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The National safety competition of 1935

The national safety competition of 1936

National safety competition of 1939

National safety competition of 1940

The National safety competition of 1941

National safety competition of 1943

Published Year

• 1930-1939 (2)
• 1940-1949 (4)

Subject

• Mine safety (6) *
• Coal mine accidents (2)
• Coal mines and mining--United States (2)

Author

• Adams, William W. (6)
• Lawrence, T. D. (6) *
• Getzin, E. E. (1)
• White, D. R. (1)

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