@misc{indiciaeab3d5c29db48,
  title = {Additional Field Methods Used in Geochemical Prospecting by the U.S. Geological Survey},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1953},
  doi = {10.3133/ofr53278},
  url = {https://pubs.usgs.gov/publication/ofr53278},
  note = {Source identifier: ofr53278}
}