@misc{indiciae5e51dd46d578,
  title = {U-Pb provenance ages of shocked zircons from the K-T boundary, Raton Basin, Colorado},
  author = {Wayne R. Premo and G. A. Izett},
  year = {1993},
  url = {https://pubs.usgs.gov/publication/70209586},
  note = {Source identifier: 70209586}
}