@misc{indiciae5c40e8a48472,
  title = {The potential source of lead in the Permian Kupferschiefer bed of Europe and some selected Paleozoic mineral deposits in the Federal Republic of Germany},
  author = {K.H. Wedepohl and M.H. Delevaux and B. R. Doe},
  year = {1978},
  doi = {10.1007/bf00375513},
  url = {https://pubs.usgs.gov/publication/70012860},
  note = {Source identifier: 70012860}
}