@misc{indiciae99e44c7d40da,
  title = {Geologic map of the Marcellina Mountain quadrangle, Gunnison County, Colorado},
  author = {David L. Gaskill and Larry H. Godwin},
  year = {1966},
  doi = {10.3133/gq511},
  url = {https://pubs.usgs.gov/publication/gq511},
  note = {Source identifier: gq511}
}