@misc{indiciae5e8f7e10e2eb,
  title = {Vegetation in the greater Denver area, Front Range urban corridor, Colorado},
  author = {J. W. Marr and W. S. Boyd},
  year = {1979},
  doi = {10.3133/i856i},
  url = {https://pubs.usgs.gov/publication/i856I},
  note = {Source identifier: i856I}
}