@misc{indiciaeca94c6fd28b0,
  title = {The development of theoretical equations to describe the flow of radioactive ion in ground water},
  author = {D.B. Grove},
  year = {1969},
  doi = {10.3133/ofr69112},
  url = {https://pubs.usgs.gov/publication/ofr69112},
  note = {Source identifier: ofr69112}
}