@misc{indiciaefc13207a0d2b,
  title = {Mapping of terrain by computer clustering techniques using multispectral scanner data and using color aerial film},
  author = {Smedes, H. W. and Linnerud, H. J. and Woolaver, L. B. and Su, M. Y. and Jayroe, R. R.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720021709},
  note = {Source identifier: 19720021709}
}