@misc{indiciaeb86a558198ed,
  title = {Letter: Lead and intelligence.},
  author = {D Bryce-Smith and S Smith and H A Waldron},
  year = {1974},
  doi = {10.1136/bmj.4.5937.165-c},
  url = {https://pubmed.ncbi.nlm.nih.gov/4370949/},
  note = {Source identifier: 4370949}
}