@misc{indiciaeabf83ca6b207,
  title = {Contour map showing minimum depth to ground water, San Bernardino Valley and vicinity, California, 1973-1983},
  author = {S. E. Carson and J. C. Matti},
  year = {1986},
  doi = {10.3133/ofr86169},
  url = {https://pubs.usgs.gov/publication/ofr86169},
  note = {Source identifier: ofr86169}
}