@misc{indiciae87a8e10aeb81,
  title = {Geologic structure, hydrology, and water quality of the Arapahoe aquifer in the Denver Basin, Colorado},
  author = {Stanley G. Robson and John C. Romero and Stanley Zawistowski},
  year = {1981},
  doi = {10.3133/ha647},
  url = {https://pubs.usgs.gov/publication/ha647},
  note = {Source identifier: ha647}
}