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  1. 1
    Minerals in the economy of Ohio.
    Government Document Serial
  2. 2
    Mining and grinding methods and costs at Claycraft Company shale pit, Taylor Station, Columbus, Ohio.
    Published 1936
    Electronic resource (PDF)
    Government Document eBook
  3. 3
    Camp, L. W., Company. Mining and grinding methods and costs at L. W. Camp Co. shale pit, Akron, Ohio.
    Published 1936
    Electronic resource (PDF)
    Government Document eBook
  4. 4
    Mining and grinding methods and costs at Camp Brothers Company shale pit, Mogadore, Ohio.
    Published 1936
    Electronic resource (PDF)
    Government Document eBook
  5. 5
    Mining and grinding methods and costs at Clay City Pipe Co. clay mine, Uhrichsville, Ohio.
    Published 1936
    Electronic resource (PDF)
    Government Document eBook
  6. 6
    Mining and grinding methods and costs at Evans Pipe Co. clay mine, Uhrichsville, Ohio.
    Published 1936
    Electronic resource (PDF)
    Government Document eBook
  7. 7
    Mining and grinding methods and costs at Claycraft Company shale pit, Taylor Station, Columbus, Ohio.
    Published 1936
    Electronic resource (PDF)
    Government Document eBook
  8. 8
    Camp, L. W., Company. Mining and grinding methods and costs at L. W. Camp Co. shale pit, Akron, Ohio.
    Published 1936
    Electronic resource (PDF)
    Government Document eBook
  9. 9
    Mining and grinding methods and costs at Camp Brothers Company shale pit, Mogadore, Ohio.
    Published 1936
    Electronic resource (PDF)
    Government Document eBook
  10. 10
    Mining and grinding methods and costs at Clay City Pipe Co. clay mine, Uhrichsville, Ohio.
    Published 1936
    Electronic resource (PDF)
    Government Document eBook
  11. 11
    Mining and grinding methods and costs at Evans Pipe Co. clay mine, Uhrichsville, Ohio.
    Published 1936
    Electronic resource (PDF)
    Government Document eBook
  12. 12
    Mining and grinding methods and costs at Malvern Clay Co. mine, Malvern, Ohio.
    Published 1937
    Electronic resource (PDF)
    Government Document eBook
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