@misc{indiciaecde48d1d2fe1,
  title = {Pb-Bi-Ag-Cu-(Hg) chemistry of galena and some associated sulfosalts. A review and some new data from Colorado California and Pennsylvania},
  author = {Eugene E. Foord and Daniel R. Shawe},
  year = {1989},
  url = {https://pubs.usgs.gov/publication/70015352},
  note = {Source identifier: 70015352}
}