@misc{indiciaec518b0b3902a,
  title = {Digital computer terrain mapping from multispectral data},
  author = {Hoffer, R. M. and Pierce, K. L. and Smedes, H. W. and Tanguay, M. G.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700065735},
  note = {Source identifier: 19700065735}
}