@misc{indiciae9a5c356b28e7,
  title = {Germanium and uranium in coalified wood from Upper Devonian black shale},
  author = {Irving A. Breger and James M. Schopf},
  year = {1954},
  doi = {10.3133/tei496},
  url = {https://pubs.usgs.gov/publication/tei496},
  note = {Source identifier: tei496}
}