@misc{indiciae8d9a9ee78a47,
  title = {Tracers in groundwater: Use of microorganisms and microspheres},
  author = {Ronald W. Harvey and Hauke Harms},
  year = {2003},
  doi = {10.1002/0471263397.env157},
  url = {https://pubs.usgs.gov/publication/70199231},
  note = {Source identifier: 70199231}
}