@misc{indiciae3eafce7be2f9,
  title = {Non-optical aids.},
  author = {S B Verma},
  year = {1974},
  doi = {10.1097/00006324-197410000-00005},
  url = {https://pubmed.ncbi.nlm.nih.gov/4429119/},
  note = {Source identifier: 4429119}
}