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Production of explosives in the United States during the calendar year 1915 :with notes on coal-mine accidents due to explosives and a list of permissible explosives, lamps and motors tested prior to May 1, 1916

Production of explosives in the United States during the calendar year 1917 :with notes on coal-mine accidents due to explosives and a list of permissible explosives tested to April 30, 1918

Production of explosives in the United States during the calendar year 1918 :with notes on coal-mine accidents due to explosives and a list of permissible explosives tested to March 31, 1919

Production of explosives in the United States during the calendar year 1919 :with notes on coal-mine accidents due to explosives and list of permissible explosives tested to May 31, 1920


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