@misc{indiciaefe37e77af981,
  title = {Ultrasonic scaling.},
  author = {L Jacobson},
  year = {1974},
  doi = {10.1111/j.1834-7819.1974.tb02367.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4619335/},
  note = {Source identifier: 4619335}
}