Spatial and temporal variation in coal fire emissions: Examples from two eastern Kentucky coal fires

James C. Hower, Jennifer M.K. O’Keefe, Kevin R. Henke, N. Wagner, Gregory C. Copley, Donald R Blake, Trent M. Garrison, Marcos L.S. Oliveira, Rubens Müller Kautzmann, Luís F.O. Silva

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The Tiptop coal-mine fire, Kentucky: Preliminary investigation of the measurement of mercury and other hazardous gases from coal-fire gas vents

James C. Hower, Kevin R. Henke, Jennifer M.K. O’Keefe, Mark A. Engle, Donald R Blake, Glenn B. Stracher