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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