@misc{indiciaea3b9d2e04e01,
  title = {Mining Claim Activity on Federal Land in the United States},
  author = {J. Douglas Causey},
  year = {2007},
  doi = {10.3133/ds290},
  url = {https://pubs.usgs.gov/publication/ds290},
  note = {Source identifier: ds290}
}