@misc{indiciae1ce202df89e7,
  title = {Spatial region filtering in IRAF/PROS},
  author = {Mandel, Eric and Roll, John and Schmidt, Dennis and Vanhilst, Mike and Burg, Richard},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19940018051},
  note = {Source identifier: 19940018051}
}