@misc{indiciae4db1060b10dc,
  title = {New hand instruments for subgingival scaling.},
  author = {D W Macfarlane},
  year = {1974},
  doi = {10.1038/sj.bdj.4803190},
  url = {https://pubmed.ncbi.nlm.nih.gov/4616711/},
  note = {Source identifier: 4616711}
}