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Analyses of Mine and Car Samples of Coal Collected in the Fiscal Years 1913 to 1916
Arno Carl FieldnerHoward I. SmithJames Washington PaulSamuel Sanford
出版U.S. Government Printing Office, 1918
URLhttp://books.google.com.hk/books?id=h9kwQ4hp8w8C&hl=&source=gbs_api
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