@misc{indiciaeb38fa5f726e7,
  title = {IQ and environmental variables.},
  author = {W R Havender},
  year = {1978},
  doi = {10.1038/272666b0},
  url = {https://pubmed.ncbi.nlm.nih.gov/643064/},
  note = {Source identifier: 643064}
}