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Mine explosions and fires in the United States during the fiscal year ended June 30, 1933
Coal-mine explosions and fires in the United States during the fiscal year ended June 30, 1934
Coal-mine explosions and fires in the United States :during the fiscal year ended June 30, 1935
Thousands killed by coal-mine explosions in the United States
Coal-mine explosions and coal- and metal-mine fires in the United States in 1949
Coal-mine explosions and coal- and metal-mine fires in the United States in 1950, 1951, and 1952