@misc{indiciae9387fda7ef08,
  title = {Potassium, thorium, and uranium contents of upper Cenozoic basalts of the southern Rocky Mountain region, and their relation to the Rio Grande depression},
  author = {Peter W. Lipman and Carl M. Bunker and Charles A Bush},
  year = {1973},
  url = {https://pubs.usgs.gov/publication/70161765},
  note = {Source identifier: 70161765}
}