@misc{indiciaead5ee3dc2773,
  title = {History of the Colorado-Wyoming state line diatremes},
  author = {D. S. Collins and A. V. Heyl},
  year = {2016},
  doi = {10.1080/00357529.1984.11764440},
  url = {https://pubs.usgs.gov/publication/70013277},
  note = {Source identifier: 70013277}
}