@misc{indiciae6b3aff2e15ed,
  title = {Unsupervised classification of earth resources data.},
  author = {Su, M. Y. and Jayroe, R. R., Jr. and Cummings, R. E.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730032352},
  note = {Source identifier: 19730032352}
}