@misc{indiciae791848973ab3,
  title = {Field guide and road log: Pennsylvanian and Permian depositional systems and cycles in the Eagle basin, northwestern Colorado},
  author = {Christopher J. Schenk and S. Y. Johnson and J. A. Karachewski},
  year = {1987},
  doi = {10.3133/ofr87430},
  url = {https://pubs.usgs.gov/publication/ofr87430},
  note = {Source identifier: ofr87430}
}