@misc{indiciaed48e4455778f,
  title = {Mineral resources of the United States, 1909: Part II - Nonmetals},
  author = {U.S. Geological Survey},
  year = {1911},
  doi = {10.3133/70175795},
  url = {https://pubs.usgs.gov/publication/70175795},
  note = {Source identifier: 70175795}
}