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Production of explosives in the United States during the calendar year 1939

Coal-Mine Accidents in the United States, 1938

Metal- and Nonmetal-Mine Accidents in the United States During the Calendar Year 1940 (Excluding Coal Mines)

Coal-Mine Accidents in the United States, 1942

Metal- and Nonmetal-Mine Accidents in the United States During the Calendar Year 1941 (Excluding Coal Mines)


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