@misc{indiciae8941fd39933d,
  title = {Ultrasonography under direct visualization.},
  author = {A M Mansour},
  year = {1983},
  doi = {10.1016/0002-9394(83)90467-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/6869465/},
  note = {Source identifier: 6869465}
}