@misc{indiciaea3a555caa2c4,
  title = {The National Geochemical Survey: Database and documentation},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {2004},
  doi = {10.3133/ofr20041001},
  url = {https://pubs.usgs.gov/publication/ofr20041001},
  note = {Source identifier: ofr20041001}
}