@misc{indiciae92fd7bacbf72,
  title = {Development and use of a mathematical model of the San Bernardino Valley ground-water basin, California},
  author = {William F. Hardt and C. B. Hutchinson},
  year = {1980},
  doi = {10.3133/ofr80576},
  url = {https://pubs.usgs.gov/publication/ofr80576},
  note = {Source identifier: ofr80576}
}