@misc{indiciaeb929d9377b2a,
  title = {Conceptual models of groundwater flow in the Grand Canyon region, Arizona},
  author = {Jacob E. Knight and Peter W. Huntoon},
  year = {2022},
  doi = {10.3133/sir20225037},
  url = {https://pubs.usgs.gov/publication/sir20225037},
  note = {Source identifier: sir20225037}
}