@misc{indiciae4a1bffabab7c,
  title = {Comparison of the isotopic abundance of U235 and U238 and the radium activity ratios in Colorado Plateau uranium ores},
  author = {F. E. Senftle and Lorin Steiff and Frank Cuttitta and P.K. Kuroda},
  year = {1956},
  doi = {10.3133/tei485},
  url = {https://pubs.usgs.gov/publication/tei485},
  note = {Source identifier: tei485}
}