@misc{indiciae1d545842188e,
  title = {Geology of the Velva quadrangle, North Dakota},
  author = {Richard Walter Lemke},
  year = {1953},
  doi = {10.3133/gq31},
  url = {https://pubs.usgs.gov/publication/gq31},
  note = {Source identifier: gq31}
}