@misc{indiciae1259f438e8f1,
  title = {Geologic map of the Uncompahgre (Ouray) mining district, southwestern Colorado},
  author = {R. G. Luedke and W. S. Burbank},
  year = {1981},
  doi = {10.3133/i1247},
  url = {https://pubs.usgs.gov/publication/i1247},
  note = {Source identifier: i1247}
}