@misc{indiciae58360bbde175,
  title = {Combined use of 15N and 18O of nitrate and 11B to evaluate nitrate contamination in groundwater},
  author = {R. L. Seiler},
  year = {2005},
  doi = {10.1016/j.apgeochem.2005.04.007},
  url = {https://pubs.usgs.gov/publication/70027819},
  note = {Source identifier: 70027819}
}