@misc{indiciaeb7f55e2013ce,
  title = {Photogeologic map of the Split Rock SW quadrangle, Fremont and Sweetwater Counties, Wyoming},
  author = {C. H. Marshall},
  year = {1959},
  doi = {10.3133/i306},
  url = {https://pubs.usgs.gov/publication/i306},
  note = {Source identifier: i306}
}