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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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