@misc{indiciaee46185e69220,
  title = {External vigilance.},
  author = {R J Jones},
  year = {1970},
  doi = {10.1097/00000542-197006000-00025},
  url = {https://pubmed.ncbi.nlm.nih.gov/5426269/},
  note = {Source identifier: 5426269}
}