@misc{indiciae7f3697b3d145,
  title = {Mineral analyses from the laboratories of the United States Geological Survey, 1880 to 1903},
  author = {Frank Wigglesworth Clarke},
  year = {1903},
  doi = {10.3133/b220},
  url = {https://pubs.usgs.gov/publication/b220},
  note = {Source identifier: b220}
}