@misc{indiciaea1d57448c002,
  title = {Mercury isotope fractionation during ore retorting in the Almadén mining district, Spain},
  author = {John E. Gray and Michael J. Pribil and Pablo L. Higueras},
  year = {2013},
  doi = {10.1016/j.chemgeo.2013.08.036},
  url = {https://pubs.usgs.gov/publication/70073703},
  note = {Source identifier: 70073703}
}