@misc{indiciae39ec89bd1662,
  title = {X-ray fluorescence determination of titanium in geological materials},
  author = {A.E. Hubert and T. T. Chao},
  year = {1977},
  doi = {10.1016/s0003-2670(01)84587-6},
  url = {https://pubs.usgs.gov/publication/70010408},
  note = {Source identifier: 70010408}
}