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  1. 1
    Exploratory drilling for evidence of zinc and lead ore in Dubuque County, Iowa /
    Subjects: “...Lead ores Iowa Dubuque County....”
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    Government Document eBook
  2. 2
    Exploratory drilling for evidence of zinc and lead ore in Dubuque County, Iowa /
    Subjects: “...Lead ores Iowa Dubuque County....”
    Get full text
    Government Document eBook
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