@misc{indiciae1eb00e3031e4,
  title = {Analytical data for stream sediment and soil samples from the Grand Canyon 1 degree by 2 degrees Quadrangle, Arizona},
  author = {Robert L. Turner},
  year = {1992},
  doi = {10.3133/ofr92229},
  url = {https://pubs.usgs.gov/publication/ofr92229},
  note = {Source identifier: ofr92229}
}