@misc{indiciaeb839e0fa2146,
  title = {A modified Dawkins epidural indicator: a useful teaching aid.},
  author = {M H Chester},
  doi = {10.1213/00000539-197811000-00026},
  url = {https://pubmed.ncbi.nlm.nih.gov/581639/},
  note = {Source identifier: 581639}
}