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Injury experience in coal mining, 1961 :analysis of mine safety factors, related employment, and production data

The National Safety Competition of 1962

Injury experience in coal mining, 1962

Injury experience in coal mining, 1964 :analysis of mine safety factors, related employment, and production data

Injury experience in the nonmetallic mineral industries except stone and coal, 1961-63

Injury experience in the metallic mineral industries, 1964

Injury experience in coal mining, 1965 :analysis of mine safety factors, related employment, and production data

Injury experience in coal mining, 1966 :analysis of mine safety factors, related employment, and production data

Injury experience in the metallic mineral industries, 1965


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