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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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