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  • hoskin-arthur-j-arthur-joseph
  • book-the-business-of-mining-a-brief-non-technical-exposition-of-the-principles-involved-in-the-profitable-operation-of-mines
  • read-the-business-of-mining-a-brief-non-technical-exposition-of-the-principles-involved-in-the-profitable-operation-of-mines
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