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  1. 1
    Iron-ore deposits of the Eagle Mountains, California /
    by Harder, Edmund Cecil, 1882-
    Published 1912
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    Government Document eBook
  2. 2
    The iron ores of the Iron Springs district, southern Utah /
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    Government Document eBook
  3. 3
    Iron-depositing bacteria and their geologic relations /
    by Harder, Edmund Cecil, 1882-
    Published 1919
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    Government Document eBook
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