@misc{indiciae50d05e0165a9,
  title = {Isotopic analysis of uranium in natural waters by alpha spectrometry},
  author = {K.W. Edwards},
  year = {1968},
  doi = {10.3133/wsp1696f},
  url = {https://pubs.usgs.gov/publication/wsp1696F},
  note = {Source identifier: wsp1696F}
}