@misc{indiciaed0a97d1a8556,
  title = {Sight-screener calibration study.},
  author = {V I RYAN and J ROBERTS},
  year = {1963},
  doi = {10.1097/00006324-196304000-00001},
  url = {https://pubmed.ncbi.nlm.nih.gov/13975772/},
  note = {Source identifier: 13975772}
}