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Coal-mine Fatalities in the United States, 1870-1914
Walter Frank Rittman
其他書名
With Statistics of Coal Production, Labor, and Mining Methods, by States and Calendar Years
出版Department of the Interior, Bureau of Mines, 1916
URLhttp://books.google.com.hk/books?id=vDo5AQAAMAAJ&hl=&source=gbs_api
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