@misc{indiciae2ea9864f6083,
  title = {Assessment of undiscovered copper resources associated with the Permian Kupferschiefer, Southern Permian Basin, Europe},
  author = {Michael L. Zientek and Slawomir Oszczepalski and Heather L. Parks and James D. Bliss and Gregor Borg and Stephen E. Box and Paul Denning and Timothy S. Hayes and Volker Spieth and Cliff D. Taylor},
  year = {2015},
  doi = {10.3133/sir20105090u},
  url = {https://pubs.usgs.gov/publication/sir20105090U},
  note = {Source identifier: sir20105090U}
}