@misc{indiciaee077e8d17305,
  title = {Photogeologic map of the Heaton Knolls NW quadrangle, Mohave County, Arizona},
  author = {C. H. Marshall},
  year = {1956},
  doi = {10.3133/i143},
  url = {https://pubs.usgs.gov/publication/i143},
  note = {Source identifier: i143}
}