@misc{indiciaef13f766daea8,
  title = {Classification and mapping of coal refuse, vegetative cover types, and forest types by digital processing ERTS-1 data},
  author = {Borden, F. Y. and Merembeck, B. F. and Thompson, D. N. and Turner, B. J. and Williams, D. L.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19750033038},
  note = {Source identifier: 19750033038}
}