@misc{indiciae1906dbb02d4a,
  title = {Results and assessment of uranium series dating of vertebrate fossils from Quaternary alluvium in Colorado},
  author = {Barney J. Szabo},
  year = {1980},
  doi = {10.2307/1550593},
  url = {https://pubs.usgs.gov/publication/70012365},
  note = {Source identifier: 70012365}
}