@misc{indiciaeae50b9f6c7b7,
  title = {Sixteenth Annual Report of the United States Geological Survey to the Secretary of the Interior, 1894-1895: Part II - Papers of an economic character},
  author = {Charles D. Walcott},
  year = {1896},
  doi = {10.3133/ar16\_2},
  url = {https://pubs.usgs.gov/publication/ar16\_2},
  note = {Source identifier: ar16\_2}
}