@misc{indiciae4d012a84bb79,
  title = {Geochemical surveys in the United States in relation to health.},
  author = {H. A. Tourtelot},
  year = {1979},
  doi = {10.1098/rstb.1979.0094},
  url = {https://pubs.usgs.gov/publication/70012528},
  note = {Source identifier: 70012528}
}