@misc{indiciae4b30a320ac1a,
  title = {Gold toning.},
  author = {E P SAMUEL},
  year = {1953},
  doi = {10.3109/10520295309105237},
  url = {https://pubmed.ncbi.nlm.nih.gov/13089938/},
  note = {Source identifier: 13089938}
}