@misc{indiciaec0cee5c10646,
  title = {Geologic map of the Fort Peck area, Montana, showing structure contours, on top of the Judith River formation},
  author = {Fred S. Jensen},
  year = {1952},
  doi = {10.3133/ofr5283},
  url = {https://pubs.usgs.gov/publication/ofr5283},
  note = {Source identifier: ofr5283}
}