@misc{indiciaedf65ebf4143a,
  title = {New observations on the age and structure of Proterozoic quartzites in Wisconsin},
  author = {Gene L. LaBerge and J. S. Klasner and Paul E. Myers},
  year = {1991},
  doi = {10.3133/b1904b},
  url = {https://pubs.usgs.gov/publication/b1904B},
  note = {Source identifier: b1904B}
}