@misc{indiciaef7eea24d5a2f,
  title = {Thoron-tartaric acid systems for spectrophotometric determination of thorium},
  author = {F. S. Grimaldi and Mary H. Fletcher},
  year = {2002},
  doi = {10.1021/ac60113a011},
  url = {https://pubs.usgs.gov/publication/70010583},
  note = {Source identifier: 70010583}
}