@misc{indiciaeace32f2e7a98,
  title = {Definitive X-ray powder data for covellite, anilite, djurleite, and chalcocite},
  author = {Robert W. Potter and Howard T. Evans},
  year = {1976},
  url = {https://pubs.usgs.gov/publication/70232237},
  note = {Source identifier: 70232237}
}