@misc{indiciaeab0f499569d0,
  title = {Contributions to economic geology, 1904},
  author = {Samuel Franklin Emmons and Edwin C. Eckel},
  year = {1905},
  doi = {10.3133/b260},
  url = {https://pubs.usgs.gov/publication/b260},
  note = {Source identifier: b260}
}