@misc{indiciae1a39dcf79247,
  title = {Eighteenth annual report of the United States Geological Survey to the Secretary of the Interior, 1896-1897: Part III - Economic geology},
  author = {G. F. Becker and J. E. Spurr and H. B. Goodrich and Bailey Willis and W. H. Weed and Louis Valentine Pirsson and Waldemar Lindgren and F. H. Knowlton and Chester Wells Purington},
  year = {1897},
  doi = {10.3133/ar18\_3},
  url = {https://pubs.usgs.gov/publication/ar18\_3},
  note = {Source identifier: ar18\_3}
}