@misc{indiciae8c0aa651af85,
  title = {Map showing transportation routes in the Parker Quadrangle, Arapahoe and Douglas counties, Colorado},
  author = {J. O. Maberry},
  year = {1972},
  doi = {10.3133/i770c},
  url = {https://pubs.usgs.gov/publication/i770C},
  note = {Source identifier: i770C}
}