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  1. 1
    Book

    The geology of the metamorphosed Biwabik iron-formation, eastern Mesabi district, Minnesota.
  2. 2
    by Grout, Frank F. 1880-
    Published 1959
    Book

    The geology of Cook County, Minnesota
  3. 3
    by Schwartz, George M. 1892-
    Published 1954
    Book

    Minnesota's rocks and waters a geological story
  4. 4
    by Schwartz, George M. 1892-
    Published 1949
    Book

    The geology of the Duluth Metropolitan Area.
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