@misc{indiciaef289b75f9636,
  title = {Occurrence of arsenic in the Dry Creek Basin, Sonoma County, California},
  author = {Robert F. Middelburg},
  year = {1976},
  doi = {10.3133/wri7630},
  url = {https://pubs.usgs.gov/publication/wri7630},
  note = {Source identifier: wri7630}
}