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Showing 1 - 3 results of 3 for search '"Mining research contract report."', query time: 0.23s Refine Results
  1. 1
    Microwave detection of lost wells and unknown water-filled voids in coal mines.
    Published 1984
    “...Mining research contract report....”
    Government Document Book
  2. 2
    Determining effectiveness of past mine fire surface seal abatement methods.
    by Hanson, Lowell C.
    Published 1990
    “...Mining research contract report....”
    Government Document Microform Book
  3. 3
    High angle mining system.
    by Christofferson, Donald
    Published 1983
    “...Mining research contract report....”
    Government Document Microform Book
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