@misc{indiciae44e53ddd622c,
  title = {Stratigraphy, structure, and paleogeography of Pennsylvanian and Permian rocks, San Juan Basin and adjacent areas, Utah, Colorado, Arizona, and New Mexico},
  author = {A. Curtis Huffman and Steven M. Condon},
  year = {1993},
  doi = {10.3133/b1808o},
  url = {https://pubs.usgs.gov/publication/b1808O},
  note = {Source identifier: b1808O}
}