@misc{indiciaef7fd76a6e10c,
  title = {Uranium and thorium in the accessory allanite of igneous rocks},
  author = {William L. Smith and Mona L. Franck and Alexander M. Sherwood},
  year = {1956},
  doi = {10.3133/tei398},
  url = {https://pubs.usgs.gov/publication/tei398},
  note = {Source identifier: tei398}
}