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Coke-oven accidents in the United States during the calendar year 1919

Coke-oven accidents in the United States :during the calendar year 1920

Metal-mine accidents in the United States :during the calendar year 1919 (with supplemental labor and accident tables for the years 1911 to 1919, inclusive)

Metal-mine accidents in the United States :during the calendar year 1920

Quarry accidents in the United States :during the calendar year 1920


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