![Changes in the extent of surface mining and reclamation in the Central Appalachians detected using a 1976–2006 Landsat time series]()
Changes in the extent of surface mining and reclamation in the Central Appalachians detected using a 1976–2006 Landsat time seriesPhilip A. Townsend; David P. Helmers; Clayton C. Kingdon; Brenden E. McNeil; Kirsten M. de Beurs; Keith N. Eshleman · 2009