@misc{indiciae179f3a5b4e8b,
  title = {[Improved ultrasonic diagnosis through grey value presentation].},
  author = {H Frommhold and D Koischwitz},
  year = {1977},
  doi = {10.1055/s-0028-1104888},
  url = {https://pubmed.ncbi.nlm.nih.gov/837855/},
  note = {Source identifier: 837855}
}