@misc{indiciaeadbd640ccdc4,
  title = {Map showing approximate ground-water conditions in the Parker quadrangle, Arapahoe and Douglas Counties, Colorado},
  author = {J. O. Maberry and E. R. Hampton},
  year = {1972},
  doi = {10.3133/i770k},
  url = {https://pubs.usgs.gov/publication/i770K},
  note = {Source identifier: i770K}
}