@misc{indiciae18bf12c81642,
  title = {Letter: Planning for area needs.},
  author = {A D Isaacs},
  year = {1973},
  doi = {10.1016/s0140-6736(73)90956-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/4128031/},
  note = {Source identifier: 4128031}
}