@misc{indiciae9f437f2fb68f,
  title = {Alunite-natroalunite identification using field tests and a computer-plotted overlay for X-ray diffraction charts},
  author = {Charles G. Cunningham},
  year = {1976},
  doi = {10.3133/ofr76403},
  url = {https://pubs.usgs.gov/publication/ofr76403},
  note = {Source identifier: ofr76403}
}