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  1. 1
    The mineral economy of Brazil : Economia mineral do Brasil /
    Published 1999
    Government Document Software eBook
  2. 2
    Mineral resources data system : MRDS /
    Published 1996
    Government Document Software Serial
  3. 3
    Minerals and materials information CD-ROM /
    Published 1994
    Government Document Software Serial
  4. 4
    U.S. Geological Survey mineral databases, MRDS and MAS/MILS /
    Published 2000
    Government Document Software eBook
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