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Tertiary coals in south Texas [electronic resource] : anomalous cannel-like coals of Webb County (Claiborne Group, Eocene) and lignites of Atascosa County (Jackson Group, Eocene)--geologic setting, character, source-rock and coal-bed methane potential : field trip guidebook / edited by P.D. Warwick, C.E. Aubourg, and J.C. Willett. |
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