@misc{indiciaea8386e6d2844,
  title = {The determination of sulfate and sulfide sulfur in rocks or minerals},
  author = {Angelina C. Vlisidis},
  year = {1966},
  doi = {10.3133/b1214d},
  url = {https://pubs.usgs.gov/publication/b1214D},
  note = {Source identifier: b1214D}
}