@misc{indiciae6ac5f473d9a5,
  title = {Geologic Map of the Estes Park 30' x 60' Quadrangle, North-Central Colorado},
  author = {J. C. Cole and William A. Braddock},
  year = {2009},
  doi = {10.3133/sim3039},
  url = {https://pubs.usgs.gov/publication/sim3039},
  note = {Source identifier: sim3039}
}