How to Cite:
Olin, H. L. & Troeltzsch, J. R., (1925) “The Distribution of Ash and Sulfur in Iowa Coals as Affected by Washing and Flotation”, Iowa Geological Survey Annual Report 31(1), 153-166. doi: https://doi.org/10.17077/2160-5270.1259
Rights: Material in the public domain. No restrictions on use.
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