@misc{indiciaef03fb9970f16,
  title = {Surficial geologic map of the Appel Butte Quadrangle, Campbell County, Wyoming},
  author = {D. S. Fullerton},
  year = {1977},
  doi = {10.3133/mf918},
  url = {https://pubs.usgs.gov/publication/mf918},
  note = {Source identifier: mf918}
}