@misc{indiciaeaf2d853fceac,
  title = {Further data on presbyopia in different ethnic groups.},
  author = {H W Hofstetter},
  year = {1968},
  doi = {10.1097/00006324-196808000-00004},
  url = {https://pubmed.ncbi.nlm.nih.gov/5244428/},
  note = {Source identifier: 5244428}
}