@misc{indiciae0ce579638adf,
  title = {Subsurface stratigraphy of Lower Mesozoic and Upper Paleozoic formations in the basin area of south-central Montana},
  author = {Herbert D. Hadley and L.S. Gardner and C.P. Rogers},
  year = {1945},
  doi = {10.3133/oc19},
  url = {https://pubs.usgs.gov/publication/oc19},
  note = {Source identifier: oc19}
}