@misc{indiciaed8265ca592ce,
  title = {Preliminary geologic map of the Eldorado Springs quadrangle, Boulder and Jefferson Counties, Colorado},
  author = {J. D. Wells},
  year = {1963},
  doi = {10.3133/i383},
  url = {https://pubs.usgs.gov/publication/i383},
  note = {Source identifier: i383}
}