@misc{indiciae27335ac1571e,
  title = {Geochemical sampling in arid environments by the U.S. Geological Survey},
  author = {Margaret Hinkle},
  year = {1988},
  doi = {10.3133/cir997},
  url = {https://pubs.usgs.gov/publication/cir997},
  note = {Source identifier: cir997}
}