@misc{indiciaea3d5c41f746a,
  title = {Geological age of the Claypool site, northeastern Colorado},
  author = {H.E. Malde},
  year = {2017},
  doi = {10.2307/276202},
  url = {https://pubs.usgs.gov/publication/70220494},
  note = {Source identifier: 70220494}
}