@misc{indiciae599a1bf2e121,
  title = {Aids for determining visual acuity.},
  author = {M B RAIFORD},
  year = {1951},
  doi = {10.1016/0002-9394(51)91043-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/14838071/},
  note = {Source identifier: 14838071}
}