@misc{indiciae0da7ac338c80,
  title = {National geochronological and natural radioelement data bases},
  author = {Robert E. Zartman and Charles A. Bush and C. C. Abston},
  year = {1995},
  doi = {10.3133/ds14},
  url = {https://pubs.usgs.gov/publication/ds14},
  note = {Source identifier: ds14}
}