@misc{indiciaef53829743f24,
  title = {Abundance and distribution of uranium and thorium in zircon, sphene, apatite, epidote, and monazite in granitic rocks},
  author = {Patrick M. Hurley and Harold W. Fairbairn},
  year = {1956},
  doi = {10.3133/tei636},
  url = {https://pubs.usgs.gov/publication/tei636},
  note = {Source identifier: tei636}
}