@misc{indiciaef28794ce2129,
  title = {Automatic mapping of strip mine operations from spacecraft data},
  author = {Rogers, R. H. and Reed, L. E. and Pettyjohn, W. A.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19740023683},
  note = {Source identifier: 19740023683}
}