@misc{indiciaec4c39ee5f6cd,
  title = {Classification of spatially unresolved objects},
  author = {Nalepka, R. F. and Horwitz, H. M. and Hyde, P. D. and Morgenstern, J. P.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720021682},
  note = {Source identifier: 19720021682}
}