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Proposed classification of coals
Ashley, Geo. H. (George Hall), 1866-1951[Harrisburgh, Penna., 1921] -
...Standard time scale, proposed
Ashley, Geo. H. (George Hall), 1866-1951[Harrisburg, Penna., 1920] -
Rhode Island coal
Ashley, Geo. H. (George Hall), 1866-1951Washington, Govt. print. off., 1915.Online Full text via HathiTrust
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Geological map of the lower Carboniferous area of Southern Indiana (Corydon sheet): to accompany the report on the geology of the region
Ashley, Geo. H. (George Hall),1866-1951, Kindle, E. M. (Edward Martin),1869-1940., and Blatchley, W. S. (Willis Stanley),1859-19401902From the 27th Annual report of the Department of Geology and Natural Resources of Indiana, 1902. Includes three East-West cross-sections: through N...
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