@misc{indiciaece45ffe2a64a,
  title = {The Frontier Formation and associated rocks of northeastern Utah and northwestern Colorado},
  author = {Cornelius M. Molenaar and B.W. Wilson},
  year = {1990},
  doi = {10.3133/b1787m},
  url = {https://pubs.usgs.gov/publication/b1787M},
  note = {Source identifier: b1787M}
}