@misc{indiciae85be9ad1c326,
  title = {Leasable mineral and waterpower land classification map, Leadville Quadrangle, Colorado},
  author = {Elizabeth G. Allen and Gale Alex Lutz},
  year = {1976},
  doi = {10.3133/ofr76370},
  url = {https://pubs.usgs.gov/publication/ofr76370},
  note = {Source identifier: ofr76370}
}