@misc{indiciae0ac4fea4251f,
  title = {Preliminary geologic map of the Atkinson Creek quadrangle, Colorado},
  author = {E. J. McKay},
  year = {1954},
  doi = {10.3133/mf18},
  url = {https://pubs.usgs.gov/publication/mf18},
  note = {Source identifier: mf18}
}