@misc{indiciae04a3f5472a24,
  title = {A report on the economic geology of the Silverton quadrangle, Colorado},
  author = {F. L. Ransome},
  year = {1901},
  doi = {10.3133/b182},
  url = {https://pubs.usgs.gov/publication/b182},
  note = {Source identifier: b182}
}