@misc{indiciaedff44cf7c8b7,
  title = {Reconnaissance study of the thickness of the unsaturated zone in the western conterminous United States},
  author = {M. S. Bedinger and William H. Langer},
  year = {1990},
  doi = {10.3133/ha715},
  url = {https://pubs.usgs.gov/publication/ha715},
  note = {Source identifier: ha715}
}