@misc{indiciaefc4c260da911,
  title = {Method descriptions and bibliography of routine work performed by the Branch of Geochemistry analytical laboratories, U.S. Geological Survey},
  author = {M. W. Doughten and J. N. Grossman},
  year = {1993},
  doi = {10.3133/ofr931b},
  url = {https://pubs.usgs.gov/publication/ofr931B},
  note = {Source identifier: ofr931B}
}