@misc{indiciaebb764ba58de3,
  title = {The thoron-tartaric acid systems for the spectrophotometric determination of thorium},
  author = {F. S. Grimaldi and Mary H. Fletcher},
  year = {1955},
  doi = {10.3133/tei571},
  url = {https://pubs.usgs.gov/publication/tei571},
  note = {Source identifier: tei571}
}