Showing 1 - 3 results of 3 for search 'The Survey :', query time: 0.26s Refine Results
  1. 1
    Coal resources of Cambria and Blair Counties, Pennsylvania /
    Published 1990
    “..., Topographic and Geologic Survey],...”
    Book
  2. 2
    Coal resources of Clarion County, Pennsylvania /
    by Glover, Albert D.
    Published 1987
    “..., Bureau of Topography and Geologic Survey,...”
    Government Document Book
  3. 3
    Geology and mineral resources of the Blandburg, Tipton, Altoona, and Bellwood quadrangles : Blair, Cambria, Clearfield and Centre counties, Pennsylvania /
    by Faill, Rodger T.
    Published 1989
    “..., Bureau of Topographic and Geologic Survey],...”
    Government Document Book
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