@misc{indiciaef117e725e85f,
  title = {Geology of the Eldorado Springs quadrangle, Boulder and Jefferson Counties, Colorado},
  author = {John David Wells},
  year = {1967},
  doi = {10.3133/b1221d},
  url = {https://pubs.usgs.gov/publication/b1221D},
  note = {Source identifier: b1221D}
}