@misc{indiciaecb8148254d2a,
  title = {Gypsiferous deposits on Sheep Mountain, Alaska},
  author = {Richard A. Eckhart},
  year = {1950},
  doi = {10.3133/ofr5162},
  url = {https://pubs.usgs.gov/publication/ofr5162},
  note = {Source identifier: ofr5162}
}