@misc{indiciae23ec2d0c80cf,
  title = {Mineral resources of the United States, 1891},
  author = {David T. Day},
  year = {1893},
  doi = {10.3133/70175766},
  url = {https://pubs.usgs.gov/publication/70175766},
  note = {Source identifier: 70175766}
}