@misc{indiciae9642b36fafc4,
  title = {Distribution of nitrate and related nitrogen species in the unsaturated zone, Redlands and vicinity, San Bernardino County, California},
  author = {John M. Klein and Wesley L. Bradford},
  year = {1979},
  doi = {10.3133/wri7960},
  url = {https://pubs.usgs.gov/publication/wri7960},
  note = {Source identifier: wri7960}
}