@misc{indiciae959c7fd8ae82,
  title = {Preliminary geologic map of Greasewood Gulch Quadrangle, Rio Blanco County, Colorado},
  author = {D.C. Duncan},
  year = {1976},
  doi = {10.3133/mf755},
  url = {https://pubs.usgs.gov/publication/mf755},
  note = {Source identifier: mf755}
}