@misc{indiciae2b7cc6ea90db,
  title = {Mackay-Marg tonometry by technicians.},
  author = {W C Petersen and W A Schlegel},
  year = {1973},
  doi = {10.1016/0002-9394(73)90085-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/4148534/},
  note = {Source identifier: 4148534}
}