@misc{indiciae52ca13e7e3d7,
  title = {Geographic information systems.},
  author = {O A Khan},
  year = {1999},
  doi = {10.2105/ajph.89.7.1125},
  url = {https://pubmed.ncbi.nlm.nih.gov/10394333/},
  note = {Source identifier: 10394333}
}