@misc{indiciae446c2ee09ff8,
  title = {Composition of fluid inclusions, cave-in-rock fluorite district, Illinois, and upper Mississippi valley zinc-lead district},
  author = {W. E. Hall and I. Friedman},
  year = {1963},
  doi = {10.2113/gsecongeo.58.6.886},
  url = {https://pubs.usgs.gov/publication/70221069},
  note = {Source identifier: 70221069}
}