@misc{indiciae5bfd56a79b35,
  title = {Topographic map of the Nankoweap-Kwagunt area, Grand Canyon, Arizona},
  author = {Ivo Lucchitta},
  year = {1995},
  doi = {10.3133/ofr95529},
  url = {https://pubs.usgs.gov/publication/ofr95529},
  note = {Source identifier: ofr95529}
}