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Contributions to the Study of Coal: A Proposed Simplification of the Parr Unit Coal Formula, Ash-to-Mineral Matter Correction in Coal Analyses, Unit ... Applied to Illinois Coals (Classic Reprint) - Hardcover

Thiessen, Gilbert

 
9780265870655: Contributions to the Study of Coal: A Proposed Simplification of the Parr Unit Coal Formula, Ash-to-Mineral Matter Correction in Coal Analyses, Unit ... Applied to Illinois Coals (Classic Reprint)