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By: Exxon Company U.S.A. - Hayden-Wing Associates. - Wyoming. Game and Fish Dept.Edition:Publication info: Sheridan, Wyo, Hayden-Wing Associates, [1990]Volume:Series:Holding Institution: Bureau of Land ManagementSubjects: Coalbed methane $ Elk Environmental aspects Gas well drilling Habitat conservation Methane industry Wildlife conservation WyomingBHL Collections: