@misc{indiciae9f876a236f57,
  title = {Modified determination of radium in water},
  author = {F. B. Barker and L. L. Thatcher},
  year = {2002},
  doi = {10.1021/ac60131a003},
  url = {https://pubs.usgs.gov/publication/70010722},
  note = {Source identifier: 70010722}
}