@misc{indiciaec05a391011ea,
  title = {A periscopic viewer.},
  author = {S A VINCENT},
  year = {1959},
  doi = {10.1016/s0140-6736(59)91894-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/13642859/},
  note = {Source identifier: 13642859}
}