@misc{indiciae16dafceaae9b,
  title = {Mercury and other trace elements in sphalerite and wallrocks from central Kentucky, Tennessee, and Appalachian zinc districts},
  author = {Janice L. Jolly and Allen Van Heyl},
  year = {1968},
  doi = {10.3133/b1252f},
  url = {https://pubs.usgs.gov/publication/b1252F},
  note = {Source identifier: b1252F}
}