@misc{indiciaef8b9ff5dfb5f,
  title = {Image selection system},
  author = {Knutson, M. A. and Hurd, D. and Hubble, L. and Kroeck, R. M.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19750004350},
  note = {Source identifier: 19750004350}
}