@misc{indiciae080012ba13b1,
  title = {Map showing types of bedrock and surficial deposits in the Telluride Quadrangle, San Miguel, Ouray, and San Juan counties, Colorado},
  author = {R. G. Luedke and W. S. Burbank},
  year = {1976},
  doi = {10.3133/i973a},
  url = {https://pubs.usgs.gov/publication/i973A},
  note = {Source identifier: i973A}
}