@misc{indiciae6fff9f30d773,
  title = {[A proposal concerning information and research guidelines, with reference to internal migration. A preliminary discussion about the 1980 census].},
  author = {J L Madeira and M G Castro},
  year = {1978},
  url = {https://pubmed.ncbi.nlm.nih.gov/12311385/},
  note = {Source identifier: 12311385}
}