@misc{indiciae223d1a8c6ab1,
  title = {Environmental tritium in the Edwards Aquifer, central Texas 1963-71},
  author = {Frederick Joseph Pearson and Paul L. Rettman and T.A. Wyerman},
  year = {1975},
  doi = {10.3133/ofr74362},
  url = {https://pubs.usgs.gov/publication/ofr74362},
  note = {Source identifier: ofr74362}
}