@misc{indiciae5e83e5a1403c,
  title = {Vegetation map of the Parker quadrangle, Arapahoe and Douglas Counties, Colorado},
  author = {J. R. Keith and J. O. Maberry},
  year = {1973},
  doi = {10.3133/i770n},
  url = {https://pubs.usgs.gov/publication/i770N},
  note = {Source identifier: i770N}
}