@misc{indiciae6d35efa21f26,
  title = {Geochronology of archean gneisses in the Lake Helen area, southwestern Big Horn Mountains, Wyoming},
  author = {Joseph G. Arth and F. Barker and T. W. Stern},
  year = {1980},
  doi = {10.1016/0301-9268(80)90078-9},
  url = {https://pubs.usgs.gov/publication/70012350},
  note = {Source identifier: 70012350}
}