@misc{indiciaedac65b4b5861,
  title = {Geochemical method of prospecting for ore deposits},
  author = {E.A. Sergeev and V.P. Sokoloff},
  year = {1941},
  doi = {10.3133/ofr4821b},
  url = {https://pubs.usgs.gov/publication/ofr4821B},
  note = {Source identifier: ofr4821B}
}