@misc{indiciaeec9b222a4dd2,
  title = {A field method of spectrographic analysis for use in geochemical exploration work},
  author = {Uteana Oda and A.T. Myers and E.F. Cooley},
  year = {1959},
  doi = {10.3133/ofr5991},
  url = {https://pubs.usgs.gov/publication/ofr5991},
  note = {Source identifier: ofr5991}
}