@misc{indiciaeb6258ec49856,
  title = {Mineral facilities of Europe},
  author = {Francisco Almanzar and Michael S. Baker and Nurudeen Elias and Eric Guzman},
  year = {2010},
  doi = {10.3133/ofr20101257},
  url = {https://pubs.usgs.gov/publication/ofr20101257},
  note = {Source identifier: ofr20101257}
}