Search U.S. government technical reports digitized or harvested by TRAIL.
National safety competition of 1939
Use of rock dust in bituminous-coal mines
Coke-oven accidents in the United Statesduring the calendar year 1939
Coke-oven accidents in the United States during the calendar year 1938
Coal-Mine Accidents in the United States, 1937
Quarry Accidents in the United States During the Calendar Year 1938
National safety competition of 1940
Metal-Mine Accidents in the United States During the Calendar Year 1938
Quarry Accidents in the United States During the Calendar Year 1939
Production of explosives in the United Statesduring the calendar year 1940
Production of industrial explosives in the United Statesduring the calendar year 1941
Coke-oven accidents in the United Statesduring the calendar year 1940
The National safety competition of 1941
Coal-Mine Accidents in the United States, 1939
Coal-Mine Accidents in the United States, 1940
Quarry Accidents in the United States During the Calendar Year 1940
Coke-oven accidents in the United States :calendar year 1941
Quarry Accidents in the United States During the Calendar Year 1941
Coke-oven accidents in the United States :calendar year 1942
Production of industrial explosives in the United Statesduring the calendar year 1942
National safety competition of 1943
Production of industrial explosives in the United Statesduring the calendar year 1943
Coal-Mine Accidents in the United States, 1941
Quarry Accidents in the United States During the Calendar Year 1942
Coke-oven accidents in the United States :calendar year 1943