@misc{indiciae57fe7d3c2c15,
  title = {Mineral resources of the United States, 1887},
  author = {David T. Day},
  year = {1888},
  doi = {10.3133/70175762},
  url = {https://pubs.usgs.gov/publication/70175762},
  note = {Source identifier: 70175762}
}