@misc{indiciaeceec2f5fdf1d,
  title = {Progress report, Colorado Front Range area},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1951},
  doi = {10.3133/tem97a},
  url = {https://pubs.usgs.gov/publication/tem97A},
  note = {Source identifier: tem97A}
}