@misc{indiciaef95c168cd85e,
  title = {Crystals of coexisting alunite and jarosite, Goldfield, Nevada},
  author = {William J. Keith and L. Calk and R. P. Ashley},
  year = {1980},
  doi = {10.3133/pp1124c},
  url = {https://pubs.usgs.gov/publication/pp1124C},
  note = {Source identifier: pp1124C}
}