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Mine explosions in the United States during the fiscal year ending June 30, 1928

Mine explosions in the United States during the fiscal year ending June 30, 1929

Thousands killed by coal-mine explosions in the United States

Coal-mine explosions and coal- and metal-mine fires in the United States during the fiscal year ended June 30, 1939

Coal-mine explosions and coal- and metal-mines fires in the United States during the fiscal year ended June 30, 1940

How mine workers can help to prevent mine explosions

Coal-mine explosions and coal- and metal-mine fires in the United States during the fiscal year ended June 30, 1941

Coal-mine explosions and coal- and metal-mine fires in the United States during the fiscal year ended June 30, 1945

Coal-mine explosions and coal- and metal-mine fires in the United States during the fiscal year ended June 30, 1947


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