@misc{indiciae1c32b89976ff,
  title = {A spectrophotometric method for the determination of gold useful in mineral exploration},
  author = {H. W. Lakin and H. M. Nakagawa},
  year = {1965},
  doi = {10.3133/ofr65181},
  url = {https://pubs.usgs.gov/publication/ofr65181},
  note = {Source identifier: ofr65181}
}