@misc{indiciae74ba1e17afaf,
  title = {Preliminary report on the stratigraphy of the Morrison and related formations of the Colorado Plateau region},
  author = {Lawrence Carey Craig and Clifford N. Holmes and Robert A. Cadigan and Val L. Freeman and Thomas E. Mullens and Gordon W. Weir},
  year = {1951},
  doi = {10.3133/tei180},
  url = {https://pubs.usgs.gov/publication/tei180},
  note = {Source identifier: tei180}
}