@misc{indiciae8d220f51f034,
  title = {Geologic map of the upper Arkansas River valley region, north-central Colorado},
  author = {Karl S. Kellogg and Ralph R. Shroba and Chester A. Ruleman and Robert G. Bohannon and William C. McIntosh and Wayne R. Premo and Michael A. Cosca and Richard J. Moscati and Theodore R. Brandt},
  year = {2017},
  doi = {10.3133/sim3382},
  url = {https://pubs.usgs.gov/publication/sim3382},
  note = {Source identifier: sim3382}
}