@misc{indiciae3f0de54a6da3,
  title = {Variations in surface resistance to enamel etching.},
  author = {S Hoffman},
  doi = {10.1177/00220345720510031601},
  url = {https://pubmed.ncbi.nlm.nih.gov/4555793/},
  note = {Source identifier: 4555793}
}