@misc{indiciaed29a0073475b,
  title = {Photogeologic map of the Springdale SW quadrangle, Kane and Washington Counties, Utah, and Mohave County, Arizona},
  author = {C. L. Pillmore},
  year = {1956},
  doi = {10.3133/i132},
  url = {https://pubs.usgs.gov/publication/i132},
  note = {Source identifier: i132}
}