@misc{indiciae65992066e0f7,
  title = {Stratigraphy of the Niobrara Formation at Pueblo, Colorado},
  author = {G. R. Scott and W. A. Cobban},
  year = {1964},
  doi = {10.3133/pp454l},
  url = {https://pubs.usgs.gov/publication/pp454L},
  note = {Source identifier: pp454L}
}