@misc{indiciae3e1e9a1793cb,
  title = {Ground water in Black Squirrel Creek Valley, El Paso County, Colorado},
  author = {Harold E. McGovern and Edward D. Jenkins},
  year = {1966},
  doi = {10.3133/ha236},
  url = {https://pubs.usgs.gov/publication/ha236},
  note = {Source identifier: ha236}
}