@misc{indiciaedeb696813fd6,
  title = {Precambrian melasyenite of Ute Creek, San Juan Mountains, Colorado — Chemistry, petrology, and strontium isotopes},
  author = {Fred Barker and Zell E. Peterman and Richard F. Marvin},
  year = {1970},
  doi = {10.3133/b1311c},
  url = {https://pubs.usgs.gov/publication/b1311C},
  note = {Source identifier: b1311C}
}