@misc{indiciae7ec2718e5b29,
  title = {Chemical analyses of tertiary volcanic rocks, central San Juan caldera complex, southwestern Colorado},
  author = {Peter W. Lipman},
  year = {2004},
  doi = {10.3133/ofr20041194},
  url = {https://pubs.usgs.gov/publication/ofr20041194},
  note = {Source identifier: ofr20041194}
}