Research Catalog

  • High angle mining system [microform].

    • Text
    • Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, [1983]
    • 1983
  • Neutralization of acid mine drainage influenced by organic additions [microform] / Richard B. Brugam ... [et al.].

    • Text
    • [Washington, DC] : Bureau of Mines, U.S. Dept. of the Interior, [1991]
    • 1991

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