@misc{indiciae4980850d48e4,
  title = {Gingivitis in Basel schoolchildren.},
  author = {A Hefti and T Engelberger and M Büttner},
  year = {1981},
  url = {https://pubmed.ncbi.nlm.nih.gov/6950508/},
  note = {Source identifier: 6950508}
}