@misc{indiciae7bd4be72d01f,
  title = {Appraisal of ground-water quality in the Bunker Hill Basin of San Bernardino Valley, California},
  author = {L. F. Duell and R. A. Schroeder},
  year = {1989},
  doi = {10.3133/wri884203},
  url = {https://pubs.usgs.gov/publication/wri884203},
  note = {Source identifier: wri884203}
}