@misc{indiciae81190814bca6,
  title = {Security clearance for scientists.},
  author = {E H Sobel},
  year = {1971},
  doi = {10.1056/nejm197102112840636},
  url = {https://pubmed.ncbi.nlm.nih.gov/5539477/},
  note = {Source identifier: 5539477}
}