@misc{indiciaeb291e8beb42f,
  title = {Core research center: Denver, Colorado},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1992},
  doi = {10.3133/25367},
  url = {https://pubs.usgs.gov/publication/25367},
  note = {Source identifier: 25367}
}