@misc{indiciae260acadbbece,
  title = {Comparison of the effects of filtration and preservation methods on analyses for strontium-90 in ground water},
  author = {L.L. Knobel and L. DeWayne Cecil and S.J. Wegner and L.L. Moore},
  year = {1992},
  doi = {10.1007/bf00396522},
  url = {https://pubs.usgs.gov/publication/70017336},
  note = {Source identifier: 70017336}
}