@misc{indiciae6e7970f9aaa0,
  title = {Geologic map of the Housetop Mountain quadrangle, Garfield and Mesa Counties, Colorado},
  author = {John R. Donnell and Warren E. Yeend},
  year = {1968},
  doi = {10.3133/ofr6879},
  url = {https://pubs.usgs.gov/publication/ofr6879},
  note = {Source identifier: ofr6879}
}