@misc{indiciae61f9337fee8b,
  title = {US immigration controls.},
  author = {A N Minuth},
  year = {1990},
  doi = {10.1016/0140-6736(90)90045-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/1967464/},
  note = {Source identifier: 1967464}
}