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Northern Natal Coal-field (area No. 2), the Utrecht Area
C. B. CoetzeeG. P. FourieK.H.L. SehlkeGeological Survey (South Africa)
其他書名
Records of Boreholes 1 to 31 Drilled for the Department of Mines
出版Government Printer, 1957
URLhttp://books.google.com.hk/books?id=C5xOAQAAMAAJ&hl=&source=gbs_api