Coal-mine Fatalities in the United States, 1925

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Coal-mine Fatalities in the United States, 1929

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Coal-mine Fatalities in the United States, 1926

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Coal-mine Accidents in the United States, 1930

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Quarry Accidents in the United States During the Calendar Year 1925

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Coal-mine Fatalities in the United States, 1925

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Metal-mine Accidents in the United States During the Calendar Year 1928

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Bulletin (United States. Bureau of Mines). no. 286, 1927

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Bulletin (United States. Bureau of Mines). no. 288, 1928

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Quarry Accidents in the United States During the Calendar Year 1926

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