@misc{indiciae465275ddfcc1,
  title = {The valence of sulfur in disulfides: An overlooked clue to the genesis of Mississippi Valley-type lead-zinc deposits},
  author = {C.S. Spirakis},
  year = {1986},
  doi = {10.2113/gsecongeo.81.6.1544},
  url = {https://pubs.usgs.gov/publication/70015199},
  note = {Source identifier: 70015199}
}