@misc{indiciae999b01437ef0,
  title = {Map showing flood-prone areas, Colorado Springs-Castle Rock area, Front Range Urban Corridor, Colorado},
  author = {J. F. McCain and W. R. Hotchkiss},
  year = {1975},
  doi = {10.3133/i857c},
  url = {https://pubs.usgs.gov/publication/i857C},
  note = {Source identifier: i857C}
}