@misc{indiciae4632125d68dc,
  title = {Maps showing distribution, thickness, and depth of salt deposits of the United States},
  author = {John R. Ege},
  year = {1985},
  doi = {10.3133/ofr8528},
  url = {https://pubs.usgs.gov/publication/ofr8528},
  note = {Source identifier: ofr8528}
}