@misc{indiciaeb2eab3f5fa76,
  title = {Digital spatial data for predicted nitrate and arsenic concentrations in basin-fill aquifers of the Southwest Principal Aquifers study area},
  author = {Tim S. McKinney and David W. Anning},
  year = {2012},
  doi = {10.3133/ds698},
  url = {https://pubs.usgs.gov/publication/ds698},
  note = {Source identifier: ds698}
}