@misc{indiciaed61cc1489da2,
  title = {Water-quality reconnaissance of the Lower Santa Ana River canyon, California},
  author = {George A. Irwin and William R. Powers},
  year = {1972},
  doi = {10.3133/ofr72181},
  url = {https://pubs.usgs.gov/publication/ofr72181},
  note = {Source identifier: ofr72181}
}