@misc{indiciae08cf1887ccf9,
  title = {The mixture problem in computer mapping of terrain: Improved techniques for establishing spectral signature, atmospheric path radiance, and transmittance},
  author = {Smedes, H. W. and Hulstrom, R. L. and Ranson, K. J.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19760010438},
  note = {Source identifier: 19760010438}
}