@misc{indiciae260f60438ba8,
  title = {Marine Jurassic formations of Montana},
  author = {Ralph Willard Imlay and L.S. Gardner and C.P. Rogers and H.D. Hadley},
  year = {1948},
  doi = {10.3133/oc32},
  url = {https://pubs.usgs.gov/publication/oc32},
  note = {Source identifier: oc32}
}