@misc{indiciae8ecd48423801,
  title = {Mapping the environment.},
  author = {K S Betts},
  year = {1997},
  doi = {10.1289/ehp.97105594},
  url = {https://pubmed.ncbi.nlm.nih.gov/9288493/},
  note = {Source identifier: 9288493}
}