@misc{indiciaea6b321a4aef6,
  title = {Groundwater sampling},
  author = {Qingren Wang and Rafael Munoz-Carpena and Adam Foster and Kati W. Migliaccio},
  year = {2010},
  url = {https://pubs.usgs.gov/publication/70056520},
  note = {Source identifier: 70056520}
}