@misc{indiciae29c7d3576698,
  title = {Letter: Migration and mental subnormality.},
  author = {L Wallin},
  year = {1974},
  doi = {10.1016/s0140-6736(74)90715-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/4134322/},
  note = {Source identifier: 4134322}
}