@misc{indiciae0ab969870e36,
  title = {Preliminary geologic map of the Grano quadrangle, North Dakota},
  author = {Richard W. Lemke and Fred S. Jensen},
  year = {1947},
  doi = {10.3133/ofr475},
  url = {https://pubs.usgs.gov/publication/ofr475},
  note = {Source identifier: ofr475}
}