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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

Metal- and Nonmetal-Mine Accidents in the United States During the Calendar Year 1939 (Excluding Coal Mines)

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

Metal- and Nonmetal-Mine Accidents in the United States During the Calendar Year 1942 (Excluding Coal Mines)


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