@misc{indiciae69215aafd3f7,
  title = {Map showing flood-prone areas, greater Denver area, Front Range Urban Corridor, Colorado},
  author = {J. F. McCain and W. R. Hotchkiss},
  year = {1975},
  doi = {10.3133/i856d},
  url = {https://pubs.usgs.gov/publication/i856D},
  note = {Source identifier: i856D}
}