@misc{indiciaeedb4fee1bd8a,
  title = {Geology and ore deposits of the western part of the Shafter district, Presidio County, Texas},
  author = {J.S. Cullison and A.E. Weissenborn},
  year = {1944},
  doi = {10.3133/ofr4423},
  url = {https://pubs.usgs.gov/publication/ofr4423},
  note = {Source identifier: ofr4423}
}