Search U.S. government technical reports digitized or harvested by TRAIL.
Mine explosions and fires in the United States during the fiscal year ending June 30, 1931
Mine explosions and fires in the United States during the fiscal year which ended June 20, 1932
Metal-mine fires and ventilation
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