@misc{indiciaece0677ea08bb,
  title = {Pyrrhotite distribution in the conterminous United States, 2020},
  author = {Jeffrey L. Mauk and Thomas C. Crafford and John D. Horton and Carma A. San Juan and Robinson},
  year = {2020},
  doi = {10.3133/fs20203017},
  url = {https://pubs.usgs.gov/publication/fs20203017},
  note = {Source identifier: fs20203017}
}