@misc{indiciae6877b02f4c51,
  title = {Geologic and biostratigraphic map of the Pierre Shale in the Colorado Springs-Pueblo area, Colorado},
  author = {Glenn R. Scott and W. A. Cobban},
  year = {1986},
  doi = {10.3133/i1627},
  url = {https://pubs.usgs.gov/publication/i1627},
  note = {Source identifier: i1627}
}