@misc{indiciaef514901e4dbe,
  title = {Assessment of undiscovered copper resources of the world, 2015},
  author = {Jane M. Hammarstrom and Michael L. Zientek and Heather L. Parks and Connie L. Dicken and U.S. Geological Survey Global Copper Mineral Resource Assessment Team},
  year = {2019},
  doi = {10.3133/sir20185160},
  url = {https://pubs.usgs.gov/publication/sir20185160},
  note = {Source identifier: sir20185160}
}