@misc{indiciae9b366f654b3e,
  title = {IMWA 2013 mid-conference tour to Leadville, Colorado, August 7th, 2013},
  author = {Raymond H. Johnson},
  year = {2013},
  url = {https://pubs.usgs.gov/publication/70048303},
  note = {Source identifier: 70048303}
}