@misc{indiciaee8a55693c731,
  title = {Distribution and quality of potential sources of aggregate infrastructure resources project area, Colorado-Wyoming},
  author = {William H. Langer and Gregory N. Green and Daniel H. Knepper and David A. Lindsey and David W. Moore and L. David Nealey and John C. Reed},
  year = {1997},
  doi = {10.3133/ofr97477},
  url = {https://pubs.usgs.gov/publication/ofr97477},
  note = {Source identifier: ofr97477}
}