[Borehole Logs for the Upper Michigan Precambrian Basins], report, 1979; (https://digital.library.unt.edu/ark:/67531/metadc1634464/m1/4/: accessed August 15, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .
[Borehole Logs for the Upper Michigan Precambrian Basins], report, 1979; (https://digital.library.unt.edu/ark:/67531/metadc1634464/m1/4/: accessed August 15, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .