@misc{indiciae603c3e940a82,
  title = {Contributions to economic geology, 1920, Part I, Metals and nonmetals except fuels--Some deposits of manganese ore in Colorado},
  author = {E. L. Jones},
  year = {1921},
  doi = {10.3133/b715d},
  url = {https://pubs.usgs.gov/publication/b715D},
  note = {Source identifier: b715D}
}