@misc{indiciae19127e1ad7ad,
  title = {Preliminary report on the geology of the Zahl No. 4 Quadrangle, North Dakota},
  author = {Garland B. Gott},
  year = {1947},
  doi = {10.3133/ofr487},
  url = {https://pubs.usgs.gov/publication/ofr487},
  note = {Source identifier: ofr487}
}