@misc{indiciaeba7a8afdd630,
  title = {Index to water-quality data available from the U.S. Geological Survey in machine-readable form to December 31, 1972: Western region},
  author = {Charles R. Showen and Owen O. Williams},
  year = {1973},
  doi = {10.3133/wri7324},
  url = {https://pubs.usgs.gov/publication/wri7324},
  note = {Source identifier: wri7324}
}