@misc{indiciae6fed34a6391f,
  title = {Preliminary geologic map of the Middle Dry Fork Quadrangle, Garfield County, Colorado},
  author = {R. C. Johnson},
  year = {1980},
  doi = {10.3133/mf1215},
  url = {https://pubs.usgs.gov/publication/mf1215},
  note = {Source identifier: mf1215}
}