@misc{indiciaea97e3e11ab7e,
  title = {Grade, tonnage, and other models of blue-mountain-type Au-Ag polymetallic veins, Blue Mountains, Oregon, for use in resource and environmental assessment},
  author = {James D. Bliss},
  year = {1994},
  doi = {10.3133/ofr94677},
  url = {https://pubs.usgs.gov/publication/ofr94677},
  note = {Source identifier: ofr94677}
}