@misc{indiciaeb4b7f683949d,
  title = {Leadville 1 degree x 2 degrees Quadrangle, Colorado; a pre-assessment},
  author = {A. R. Wallace and Steve Ludington and T.G. Lovering and D. L. Campbell and J. E. Case and V. J. S. Grauch and D. H. Knepper},
  year = {1988},
  doi = {10.3133/ofr8874},
  url = {https://pubs.usgs.gov/publication/ofr8874},
  note = {Source identifier: ofr8874}
}