@misc{indiciae6448cd95ac91,
  title = {Search for plutonium-244 tracks in mountain pass bastnaesite},
  author = {R.L. Fleischer and C. W. Naeser},
  year = {1972},
  doi = {10.1038/240465b0},
  url = {https://pubs.usgs.gov/publication/70001435},
  note = {Source identifier: 70001435}
}