@misc{indiciaeab966838e109,
  title = {Hydraulic map of Crystal Rapids, Grand Canyon, Arizona},
  author = {Susan W. Kieffer},
  year = {1988},
  doi = {10.3133/i1897h},
  url = {https://pubs.usgs.gov/publication/i1897H},
  note = {Source identifier: i1897H}
}