@misc{indiciaecd5f0a100d13,
  title = {Geologic and biostratigraphic map of the Pierre shale between Jarre Creek and Loveland, Colorado},
  author = {Glenn R. Scott and William A. Cobban},
  year = {1965},
  doi = {10.3133/i439},
  url = {https://pubs.usgs.gov/publication/i439},
  note = {Source identifier: i439}
}