@misc{indiciae1756f5db6be3,
  title = {Colorado geology then and now: Following the route of the Colorado Scientific Society’s 1901 trip through central Colorado},
  author = {Beth Simmons},
  year = {2013},
  doi = {10.1130/2013.0033(02)},
  url = {https://pubs.usgs.gov/publication/70047112},
  note = {Source identifier: 70047112}
}