@misc{indiciaea31fad3d8d7a,
  title = {Geologic map of the Sawyer quadrangle, North Dakota},
  author = {Richard W. Lemke and Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey and Fred S. Jensen},
  year = {1947},
  doi = {10.3133/ofr474},
  url = {https://pubs.usgs.gov/publication/ofr474},
  note = {Source identifier: ofr474}
}