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- Methane content and geology of the Hartshorne coalbed in Haskell and Le Flore Counties, Okla
- Geology of the Lower Kittanning coalbed and related mining and methane emission problems in Cambria County, Pa.
- Investigation of methane emissions from an advancing face in the Belle Isle domal salt mine, Louisiana
- Assessment of methane hazards in an anomalous zone of a Gulf Coast salt dome