@misc{indiciaedcba9dafca89,
  title = {Digital map of the aquifer boundary for the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming},
  author = {Sharon Qi},
  year = {2010},
  doi = {10.3133/ds543},
  url = {https://pubs.usgs.gov/publication/ds543},
  note = {Source identifier: ds543}
}