@misc{indiciaee74163117494,
  title = {Procedure for making a mining claim density map from BML claim recordation digital data},
  author = {Harry W. Campbell},
  year = {1996},
  doi = {10.3133/ofr96736},
  url = {https://pubs.usgs.gov/publication/ofr96736},
  note = {Source identifier: ofr96736}
}