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Coal ResourcesGeologic MaterialsGeologic FeaturesCoal SeamsCoal MiningGeological SurveyUnconsolidated SedimentsCarbonate BankRadioactive Waste DisposalGeophysical LogsGeologic MappingGray ShaleSeismic ExplorationSeismic RefractionGlacial DepositsMineral ResourcesCoal FieldOutdoor Recreational FacilitiesLaboratory DataEarth Resistivity Survey
vol. (1989)
vol. (1985)
vol. (1983)
vol. (1982)
vol. (1981)
vol. (1979)