@misc{indiciaef70992562498,
  title = {Supplementary instruction.},
  author = {E Samson},
  year = {1972},
  doi = {10.1038/sj.bdj.4802845},
  url = {https://pubmed.ncbi.nlm.nih.gov/4560823/},
  note = {Source identifier: 4560823}
}