@misc{indiciae8fa0856acb9c,
  title = {Preliminary surficial geologic map and materials test data of the Golden quadrangle, Jefferson County, Colorado},
  author = {Richard Van Horn},
  year = {1968},
  doi = {10.3133/ofr68308},
  url = {https://pubs.usgs.gov/publication/ofr68308},
  note = {Source identifier: ofr68308}
}