@misc{indiciaeadedec1b65a2,
  title = {Mapping of anthracite refuse},
  author = {Mcmurtry, G. J. and Petersen, G. W. and Thompson, D. N. and Borden, F. Y.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730024531},
  note = {Source identifier: 19730024531}
}