@misc{indiciaeca6d2dfe2f87,
  title = {Response Classification Images in Vernier Acuity},
  author = {Ahumada, Albert J., Jr. and Beard, B. L. and Ellis, Stephen R.},
  year = {1997},
  url = {https://ntrs.nasa.gov/citations/20020051883},
  note = {Source identifier: 20020051883}
}