@misc{indiciae2d48e275102d,
  title = {HPBEDROCK; bedrock formations underlying the High Plains Aquifer},
  author = {Joshua M. Torres and David W. Litke and Sharon L. Qi},
  year = {1999},
  doi = {10.3133/ofr99214},
  url = {https://pubs.usgs.gov/publication/ofr99214},
  note = {Source identifier: ofr99214}
}