@misc{indiciae86d1721240ba,
  title = {A field method for the determination of titanium in rocks},
  author = {Leonard Shapiro and Walter Wallace Brannock},
  year = {1953},
  doi = {10.2113/gsecongeo.48.4.282},
  url = {https://pubs.usgs.gov/publication/70212974},
  note = {Source identifier: 70212974}
}