@misc{indiciaed30364494963,
  title = {The stratigraphy of the Upper Cretaceous rocks north of the Arkansas River in eastern Colorado},
  author = {C. H. Dane and W. G. Pierce and J.B. Reeside},
  year = {1937},
  doi = {10.3133/pp186k},
  url = {https://pubs.usgs.gov/publication/pp186K},
  note = {Source identifier: pp186K}
}