@misc{indiciaec2af43d6c7d4,
  title = {Eighteenth annual report of the United States Geological Survey to the Secretary of the Interior, 1896-1897: Part V - Mineral resources of the United States, 1896, metallic products and coal},
  author = {David T. Day},
  year = {1897},
  doi = {10.3133/ar185},
  url = {https://pubs.usgs.gov/publication/ar185},
  note = {Source identifier: ar185}
}