@misc{indiciae29a7c31c1185,
  title = {A soft-ended probe for echo-encephalography.},
  author = {S R Wealthall and J H Todd},
  year = {1972},
  doi = {10.1259/0007-1285-45-539-867},
  url = {https://pubmed.ncbi.nlm.nih.gov/4636676/},
  note = {Source identifier: 4636676}
}