@misc{indiciaeda2ccd51ce20,
  title = {Analyses of rocks and minerals from the laboratory of the United States Geological Survey, 1880 to 1914},
  author = {Frank Wigglesworth Clarke},
  year = {1915},
  doi = {10.3133/b591},
  url = {https://pubs.usgs.gov/publication/b591},
  note = {Source identifier: b591}
}