@misc{indiciaebbf43b970e9a,
  title = {Geologic map of the Glen Canyon Dam 30’ x 60’ quadrangle, Coconino County, northern Arizona},
  author = {George H. Billingsley and Susan S. Priest},
  year = {2013},
  doi = {10.3133/sim3268},
  url = {https://pubs.usgs.gov/publication/sim3268},
  note = {Source identifier: sim3268}
}