@misc{indiciaea0ab97ac29f1,
  title = {Isotopic study of galenas from the upper Mississippi Valley, the Illinois-Kentucky, and some Appalachian Valley mineral districts},
  author = {A. V. Heyl and M.H. Delevaux and R. E. Zartman and M. R. Brock},
  year = {1966},
  doi = {10.2113/gsecongeo.61.5.933},
  url = {https://pubs.usgs.gov/publication/70221230},
  note = {Source identifier: 70221230}
}