@misc{indiciaefbf96a22de8e,
  title = {Preliminary geologic map of the White Butte East Quadrangle, Hettinger County, North Dakota},
  author = {K.S. Soward},
  year = {1972},
  doi = {10.3133/ofr72354},
  url = {https://pubs.usgs.gov/publication/ofr72354},
  note = {Source identifier: ofr72354}
}