@misc{indiciae0d22c789fe29,
  title = {Investigation of the causes of sinks in the San Xavier District, Tohono O'odham Nation, Pima County, Arizona},
  author = {John P. Hoffmann and Donald R. Pool and A.D. Konieczki and Michael C. Carpenter},
  year = {1997},
  doi = {10.3133/ofr9719},
  url = {https://pubs.usgs.gov/publication/ofr9719},
  note = {Source identifier: ofr9719}
}