@misc{indiciae312a39d98c96,
  title = {Clay minerals of the Front Range; a field guide to the geology, history, and clay mineralogy of the Chieftain Mine, Dinosaur Ridge, Patch Mine, and other localities along the Front Range from Denver to Boulder, Colorado},
  author = {Daniel E. Kile},
  year = {2002},
  doi = {10.3133/ofr02413},
  url = {https://pubs.usgs.gov/publication/ofr02413},
  note = {Source identifier: ofr02413}
}