@misc{indiciae7393e9d4543a,
  title = {Semimicrodetermination of combined tantalum and niobium with selenous acid},
  author = {F. S. Grimaldi and M. Schnepfe},
  year = {2002},
  doi = {10.1021/ac60151a014},
  url = {https://pubs.usgs.gov/publication/70010964},
  note = {Source identifier: 70010964}
}