@misc{indiciae6326a4fbb272,
  title = {Preliminary geologic map of the Silverton 7.5-minute quadrangle, San Juan County, Colorado},
  author = {R. G. Luedke and W. S. Burbank},
  year = {1996},
  doi = {10.3133/ofr96275},
  url = {https://pubs.usgs.gov/publication/ofr96275},
  note = {Source identifier: ofr96275}
}