@misc{indiciaefd145ce3e0da,
  title = {Geologic map of the Trail Mountain quadrangle, Grand County, Colorado},
  author = {Glen Arthur Izett},
  year = {1974},
  doi = {10.3133/gq1156},
  url = {https://pubs.usgs.gov/publication/gq1156},
  note = {Source identifier: gq1156}
}