@misc{indiciae71d324fce1ec,
  title = {General and engineering geology of the Wray area, Colorado and Nebraska},
  author = {Dorothy Rachel Hill and Jessie M. Tompkin},
  year = {1953},
  doi = {10.3133/b1001},
  url = {https://pubs.usgs.gov/publication/b1001},
  note = {Source identifier: b1001}
}