@misc{indiciae20809b39e662,
  title = {Visual detectability gradients: effect of illiteracy.},
  author = {F Ostrosky-Solis and R Efron and E W Yund},
  year = {1991},
  doi = {10.1016/0278-2626(91)90065-g},
  url = {https://pubmed.ncbi.nlm.nih.gov/1781980/},
  note = {Source identifier: 1781980}
}