@misc{indiciae4280a8ed6a72,
  title = {Preliminary geologic map of the Bertha 3 NW Quadrangle, Campbell County, Wyoming},
  author = {E. J. McKay},
  year = {1974},
  doi = {10.3133/ofr74174},
  url = {https://pubs.usgs.gov/publication/ofr74174},
  note = {Source identifier: ofr74174}
}