@misc{indiciae2075c508ed0c,
  title = {Regionalization in Puerto Rico-problems and progress.},
  author = {R A FERRER},
  year = {1960},
  doi = {10.2105/ajph.50.9.1257},
  url = {https://pubmed.ncbi.nlm.nih.gov/13822480/},
  note = {Source identifier: 13822480}
}