@misc{indiciae72b81979184a,
  title = {Methods for determination of radioactive substances in water and fluvial sediments},
  author = {Leland Lincoln Thatcher and Victor J. Janzer and Kenneth W. Edwards},
  year = {1977},
  doi = {10.3133/twri05a5},
  url = {https://pubs.usgs.gov/publication/twri05A5},
  note = {Source identifier: twri05A5}
}