@misc{indiciaed0d2b97e9696,
  title = {An evaluation of differences between two observers plotting and measuring visual fields.},
  author = {V Berry and S M Drance and R L Wiggins},
  year = {1966},
  url = {https://pubmed.ncbi.nlm.nih.gov/5977441/},
  note = {Source identifier: 5977441}
}